{"id":467,"date":"2023-07-29T19:40:31","date_gmt":"2023-07-29T19:40:31","guid":{"rendered":"https:\/\/statorials.org\/my\/lapply-sapply-%e1%80%94%e1%80%be%e1%80%84%e1%80%b7%e1%80%ba-tapply-r-%e1%80%96%e1%80%bc%e1%80%84%e1%80%b7%e1%80%ba-%e1%80%a1%e1%80%9e%e1%80%af%e1%80%b6%e1%80%b8%e1%80%81%e1%80%bb%e1%80%9b%e1%80%94\/"},"modified":"2023-07-29T19:40:31","modified_gmt":"2023-07-29T19:40:31","slug":"lapply-sapply-%e1%80%94%e1%80%be%e1%80%84%e1%80%b7%e1%80%ba-tapply-r-%e1%80%96%e1%80%bc%e1%80%84%e1%80%b7%e1%80%ba-%e1%80%a1%e1%80%9e%e1%80%af%e1%80%b6%e1%80%b8%e1%80%81%e1%80%bb%e1%80%9b%e1%80%94","status":"publish","type":"post","link":"https:\/\/statorials.org\/my\/lapply-sapply-%e1%80%94%e1%80%be%e1%80%84%e1%80%b7%e1%80%ba-tapply-r-%e1%80%96%e1%80%bc%e1%80%84%e1%80%b7%e1%80%ba-%e1%80%a1%e1%80%9e%e1%80%af%e1%80%b6%e1%80%b8%e1%80%81%e1%80%bb%e1%80%9b%e1%80%94\/","title":{"rendered":"R \u1010\u103d\u1004\u103a apply(), lapply(), sapply() \u1014\u103e\u1004\u1037\u103a tapply() \u1010\u102d\u102f\u1037\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u1024\u101e\u1004\u103a\u1001\u1014\u103a\u1038\u1005\u102c\u1010\u103d\u1004\u103a \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c R \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a <strong>apply()<\/strong> \u104a <strong>sapply()<\/strong> \u104a <strong>lapply()<\/strong> \u1014\u103e\u1004\u1037\u103a <strong>tapply() \u1010\u102d\u102f\u1037\u104f<\/strong> \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1021\u1001\u103b\u102d\u1014\u103a\u1014\u103e\u1004\u1037\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101b\u1015\u102f\u1036 \u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u1010\u1030 \u101b\u103e\u1004\u103a\u1038\u1015\u103c\u1011\u102c\u1038\u101e\u100a\u103a\u104b<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\u1019\u1000\u103a\u1011\u101b\u1005\u103a \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u104f \u1021\u1010\u1014\u103a\u1038\u1019\u103b\u102c\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1000\u1031\u102c\u103a\u101c\u1036\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101c\u102d\u102f\u101e\u1031\u102c\u1021\u1001\u102b\u1010\u103d\u1004\u103a <strong>apply()<\/strong> \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b\u104b<\/span><\/p>\n<p> <span style=\"color: #000000;\">apply() function \u104f \u1021\u1001\u103c\u1031\u1001\u1036 syntax \u1019\u103e\u102c-<\/span><\/p>\n<p style=\"text-align: center;\"> <span style=\"color: #000000;\"><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038\u1015\u102b (X\u104a MARGIN\u104a FUN)<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">X \u101e\u100a\u103a array \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a data block \u104f \u1021\u1019\u100a\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<li> <span style=\"color: #000000;\">MARGIN \u101e\u100a\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101b\u1014\u103a \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1021\u1010\u102d\u102f\u1004\u103a\u1038\u1021\u1010\u102c\u1000\u102d\u102f \u1016\u1031\u102c\u103a\u1015\u103c\u101e\u100a\u103a (1 = \u1021\u1010\u1014\u103a\u1038\u104a 2 = \u1000\u1031\u102c\u103a\u101c\u1036)<\/span><\/li>\n<li> <span style=\"color: #000000;\">FUN \u101e\u100a\u103a \u101e\u1004\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101c\u102d\u102f\u101e\u1031\u102c \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1019\u103e\u102f (\u1025\u1015\u1019\u102c- min\u104a max\u104a sum\u104a average \u1005\u101e\u100a\u103a)<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\u1021\u1031\u102c\u1000\u103a\u1015\u102b\u1000\u102f\u1012\u103a\u101e\u100a\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1019\u103e\u102f\u1010\u103d\u1004\u103a <strong>apply()<\/strong> \u104f \u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1005\u103d\u102c\u1000\u102d\u102f \u1015\u103c\u101e\u1011\u102c\u1038\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a data frame with three columns and five rows<\/span>\ndata &lt;- data.frame(a = c(1, 3, 7, 12, 9),\n                   b = c(4, 4, 6, 7, 8),\n                   c = c(14, 15, 11, 10, 6))\ndata\n\n#abc\n#1 1 4 14\n#2 3 4 15\n#3 7 6 11\n#4 12 7 10\n#5 9 8 6\n\n<span style=\"color: #008080;\">#find the sum of each row<\/span>\napply(data, 1, sum)\n\n#[1] 19 22 24 29 23\n\n<span style=\"color: #008080;\">#find the sum of each column<\/span>\napply(data, 2, sum)\n\n#abc\n#32 29 56 \n\n<span style=\"color: #008080;\">#find the mean of each row<\/span>\napply(data, 1, mean)\n\n#[1] 6.333333 7.333333 8.000000 9.666667 7.666667\n\n<span style=\"color: #008080;\">#find the mean of each column, rounded to one decimal place<\/span>\nround(apply(data, 2, mean), 1)\n\n#abc\n#6.4 5.8 11.2 \n\n<span style=\"color: #008080;\">#find the standard deviation of each row<\/span>\napply(data, 1, sd)\n\n#[1] 6.806859 6.658328 2.645751 2.516611 1.527525\n\n<span style=\"color: #008080;\">#find the standard deviation of each column<\/span>\napply(data, 2, sd)\n\n#abc\n#4.449719 1.788854 3.563706 \n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\u1005\u102c\u101b\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u104a vector \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u104f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1010\u103d\u1004\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101c\u102d\u102f\u101e\u100a\u1037\u103a\u1021\u1001\u102b <strong>lapply()<\/strong> \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b\u104b<\/span><\/p>\n<p> <span style=\"color: #000000;\">lapply() function \u104f \u1021\u1001\u103c\u1031\u1001\u1036 syntax \u1019\u103e\u102c-<\/span><\/p>\n<p style=\"text-align: center;\"> <span style=\"color: #000000;\"><strong>\u101c\u1000\u103a\u1006\u103d\u1032(X\u104a \u1015\u103b\u1031\u102c\u103a\u1005\u101b\u102c)<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">X \u101e\u100a\u103a \u1005\u102c\u101b\u1004\u103a\u1038\u104a \u1000\u103d\u1000\u103a\u101c\u1015\u103a \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u104f \u1021\u1019\u100a\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<li> <span style=\"color: #000000;\">FUN \u101e\u100a\u103a \u101e\u1004\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101c\u102d\u102f\u101e\u1031\u102c \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1019\u103e\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\u1021\u1031\u102c\u1000\u103a\u1015\u102b\u1000\u102f\u1012\u103a\u101e\u100a\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u101b\u103e\u102d \u1000\u1031\u102c\u103a\u101c\u1036\u1019\u103b\u102c\u1038\u1015\u1031\u102b\u103a\u1010\u103d\u1004\u103a <strong>lapply() \u1000\u102d\u102f<\/strong> \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1001\u103c\u1004\u103a\u1038\u104f \u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1005\u103d\u102c\u1000\u102d\u102f \u101e\u101b\u102f\u1015\u103a\u1015\u103c\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a data frame with three columns and five rows\n<\/span>data &lt;- data.frame(a = c(1, 3, 7, 12, 9),\n                   b = c(4, 4, 6, 7, 8),\n                   c = c(14, 15, 11, 10, 6))\ndata\n\n#abc\n#1 1 4 14\n#2 3 4 15\n#3 7 6 11\n#4 12 7 10\n#5 9 8 6\n\n<span style=\"color: #008080;\">#find mean of each column and return results as a list<\/span>\napply(data, mean)\n\n#$a\n# [1] 6.4\n#\n# $b\n# [1] 5.8\n#\n# $c\n# [1] 11.2\n\n<span style=\"color: #008080;\">#multiply values in each column by 2 and return results as a list<\/span>\nlapply(data, function(data) data*2)\n\n#$a\n# [1] 2 6 14 24 18\n#\n# $b\n# [1] 8 8 12 14 16\n#\n# $c\n# [1] 28 30 22 20 12\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u1005\u102c\u101b\u1004\u103a\u1038\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101b\u1014\u103a <strong>lapply() \u1000\u102d\u102f<\/strong> \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b \u1021\u1031\u102c\u1000\u103a\u1015\u102b\u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1000 \u104e\u1004\u103a\u1038\u1000\u102d\u102f\u1015\u103c\u102f\u101c\u102f\u1015\u103a\u1015\u102f\u1036\u1000\u102d\u102f \u1015\u103c\u101e\u1011\u102c\u1038\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a list\n<\/span>x &lt;- list(a=1, b=1:5, c=1:10) \nx\n\n#$a\n# [1] 1\n#\n# $b\n# [1] 1 2 3 4 5\n#\n# $c\n# [1] 1 2 3 4 5 6 7 8 9 10\n\n<span style=\"color: #008080;\">#find the sum of each element in the list<\/span>\nlapply(x, sum)\n\n#$a\n# [1] 1\n#\n# $b\n# [1] 15\n#\n# $c\n#[1]55\n\n<span style=\"color: #008080;\">#find the mean of each element in the list<\/span>\nlapply(x, mean)\n\n#$a\n# [1] 1\n#\n# $b\n# [1] 3\n#\n# $c\n# [1] 5.5\n\n<span style=\"color: #008080;\">#multiply values of each element by 5 and return results as a list<\/span>\nlapply(x, function(x) x*5)\n\n#$a\n# [1] 5\n#\n# $b\n# [1] 5 10 15 20 25\n#\n# $c\n# [1] 5 10 15 20 25 30 35 40 45 50\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\u1005\u102c\u101b\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u104a vector \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u104f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1010\u103d\u1004\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101c\u102d\u102f\u101e\u1031\u102c\u1021\u1001\u102b\u1010\u103d\u1004\u103a <strong>sapply()<\/strong> \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u104d \u1005\u102c\u101b\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u1021\u1005\u102c\u1038 <strong>vector<\/strong> \u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u101b\u101a\u1030\u1015\u102b\u104b<\/span><\/p>\n<p> <span style=\"color: #000000;\">sapply() function \u104f \u1021\u1001\u103c\u1031\u1001\u1036 syntax \u1019\u103e\u102c-<\/span><\/p>\n<p style=\"text-align: center;\"> <span style=\"color: #000000;\"><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038\u1015\u102b (X\u104a FUN)<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">X \u101e\u100a\u103a \u1005\u102c\u101b\u1004\u103a\u1038\u104a \u1000\u103d\u1000\u103a\u101c\u1015\u103a \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u104f \u1021\u1019\u100a\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<li> <span style=\"color: #000000;\">FUN \u101e\u100a\u103a \u101e\u1004\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101c\u102d\u102f\u101e\u1031\u102c \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1019\u103e\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\u1021\u1031\u102c\u1000\u103a\u1015\u102b\u1000\u102f\u1012\u103a\u101e\u100a\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u101b\u103e\u102d \u1000\u1031\u102c\u103a\u101c\u1036\u1019\u103b\u102c\u1038\u1015\u1031\u102b\u103a\u1010\u103d\u1004\u103a <strong>sapply() \u1000\u102d\u102f<\/strong> \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1001\u103c\u1004\u103a\u1038\u104f \u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1005\u103d\u102c\u1000\u102d\u102f \u101e\u101b\u102f\u1015\u103a\u1015\u103c\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a data frame with three columns and five rows\n<\/span>data &lt;- data.frame(a = c(1, 3, 7, 12, 9),\n                   b = c(4, 4, 6, 7, 8),\n                   c = c(14, 15, 11, 10, 6))\ndata\n\n#abc\n#1 1 4 14\n#2 3 4 15\n#3 7 6 11\n#4 12 7 10\n#5 9 8 6\n\n<span style=\"color: #008080;\">#find mean of each column and return results as a vector\n<\/span>sapply(data, mean)\n\n#abc\n#6.4 5.8 11.2 \n\n<span style=\"color: #008080;\">#multiply values in each column by 2 and return results as a matrix\n<\/span>sapply(data, function(data) data*2)\n\n#abc\n#[1,] 2 8 28\n#[2,] 6 8 30\n#[3,] 14 12 22\n#[4,] 24 14 20\n#[5,] 18 16 12<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u1005\u102c\u101b\u1004\u103a\u1038\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u101c\u100a\u103a\u1015\u1010\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101b\u1014\u103a <strong>sapply() \u1000\u102d\u102f<\/strong> \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b \u1021\u1031\u102c\u1000\u103a\u1015\u102b\u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1000 \u104e\u1004\u103a\u1038\u1000\u102d\u102f\u1015\u103c\u102f\u101c\u102f\u1015\u103a\u1015\u102f\u1036\u1000\u102d\u102f \u1015\u103c\u101e\u1011\u102c\u1038\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a list\n<\/span>x &lt;- list(a=1, b=1:5, c=1:10) \nx\n\n#$a\n# [1] 1\n#\n# $b\n# [1] 1 2 3 4 5\n#\n# $c\n# [1] 1 2 3 4 5 6 7 8 9 10\n\n<span style=\"color: #008080;\">#find the sum of each element in the list<\/span>\nsapply(x, sum)\n\n#abc\n#1 15 55 \n\n<span style=\"color: #008080;\">#find the mean of each element in the list<\/span>\nsapply(x, mean)\n\n#abc\n#1.0 3.0 5.5\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>\u1014\u103e\u102d\u1015\u103a()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f vector \u1010\u1005\u103a\u1001\u102f\u104f \u1021\u1005\u102f\u1021\u101d\u1031\u1038\u101e\u102d\u102f\u1037 \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101c\u102d\u102f\u101e\u100a\u1037\u103a\u1021\u1001\u102b\u1010\u103d\u1004\u103a <strong>tapply()<\/strong> \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u103c\u102e\u1038 \u1021\u1015\u102d\u102f\u1004\u103a\u1038\u1001\u103d\u1032\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1021\u1001\u103c\u102c\u1038 vector \u1000 \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1015\u1031\u1038\u101e\u100a\u103a\u104a \u1019\u103b\u102c\u1038\u101e\u1031\u102c\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a \u1021\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/p>\n<p> <span style=\"color: #000000;\">tapply() \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u104f \u1021\u1001\u103c\u1031\u1001\u1036 syntax \u1019\u103e\u102c-<\/span><\/p>\n<p style=\"text-align: center;\"> <span style=\"color: #000000;\"><strong>\u1014\u103e\u102d\u1015\u103a\u1015\u102b (X\u104a INDEX\u104a FUN)<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">X \u101e\u100a\u103a \u1021\u101b\u102c\u101d\u1010\u1039\u1010\u102f\u104f\u1021\u1019\u100a\u103a\u1016\u103c\u1005\u103a\u1015\u103c\u102e\u1038 \u1019\u103b\u102c\u1038\u101e\u1031\u102c\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a vector \u1010\u1005\u103a\u1001\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<li> <span style=\"color: #000000;\">INDEX \u101e\u100a\u103a \u1010\u1005\u103a\u1001\u102f \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1010\u1005\u103a\u1001\u102f\u1011\u1000\u103a\u1015\u102d\u102f\u101e\u1031\u102c\u1021\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1005\u102c\u101b\u1004\u103a\u1038\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<li> <span style=\"color: #000000;\">FUN \u101e\u100a\u103a \u101e\u1004\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101c\u102d\u102f\u101e\u1031\u102c \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1019\u103e\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\u1021\u1031\u102c\u1000\u103a\u1016\u1031\u102c\u103a\u1015\u103c\u1015\u102b \u1000\u102f\u1012\u103a\u101e\u100a\u103a <strong>\u1019\u103b\u1000\u103a\u101d\u1014\u103a\u1038\u1010\u103d\u1004\u103a \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c R \u1012\u1031\u1010\u102c <em>\u1021\u1010\u103d\u1032<\/em><\/strong> \u1010\u103d\u1004\u103a <strong>tapply()<\/strong> \u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1001\u103c\u1004\u103a\u1038\u104f \u1014\u1019\u1030\u1014\u102c\u1000\u102d\u102f \u1015\u103c\u101e\u101e\u100a\u103a\u104b<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#view first six lines of <em>iris<\/em> dataset<\/span>\nhead(iris)\n\n# Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n#1 5.1 3.5 1.4 0.2 setosa\n#2 4.9 3.0 1.4 0.2 setosa\n#3 4.7 3.2 1.3 0.2 setosa\n#4 4.6 3.1 1.5 0.2 setosa\n#5 5.0 3.6 1.4 0.2 setosa\n#6 5.4 3.9 1.7 0.4 setosa\n\n<span style=\"color: #008080;\">#find the max Sepal.Length of each of the three Species<\/span>\ntapply(iris$Sepal.Length, iris$Species, max)\n\n#setosa versicolor virginica \n#5.8 7.0 7.9 \n\n<span style=\"color: #008080;\">#find the mean Sepal.Width of each of the three Species\n<\/span>tapply(iris$Sepal.Width, iris$Species, mean)\n\n# setosa versicolor virginica \n# 3,428 2,770 2,974\n\n<span style=\"color: #008080;\">#find the minimum Petal.Width of each of the three Species\n<\/span>tapply(iris$Petal.Width, iris$Species, min)\n\n# setosa versicolor virginica \n#0.1 1.0 1.4 \n<\/strong><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u1024\u101e\u1004\u103a\u1001\u1014\u103a\u1038\u1005\u102c\u1010\u103d\u1004\u103a \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c R \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a apply() \u104a sapply() \u104a lapply() \u1014\u103e\u1004\u1037\u103a tapply() \u1010\u102d\u102f\u1037\u104f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1021\u1001\u103b\u102d\u1014\u103a\u1014\u103e\u1004\u1037\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101b\u1015\u102f\u1036 \u1014\u1019\u1030\u1014\u102c\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u1010\u1030 \u101b\u103e\u1004\u103a\u1038\u1015\u103c\u1011\u102c\u1038\u101e\u100a\u103a\u104b \u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038() \u1019\u1000\u103a\u1011\u101b\u1005\u103a \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1012\u1031\u1010\u102c\u1018\u1031\u102c\u1004\u103a\u104f \u1021\u1010\u1014\u103a\u1038\u1019\u103b\u102c\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1000\u1031\u102c\u103a\u101c\u1036\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101c\u102d\u102f\u101e\u1031\u102c\u1021\u1001\u102b\u1010\u103d\u1004\u103a apply() \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b\u104b apply() function \u104f \u1021\u1001\u103c\u1031\u1001\u1036 syntax \u1019\u103e\u102c- \u101c\u103b\u103e\u1031\u102c\u1000\u103a\u1011\u102c\u1038\u1015\u102b (X\u104a MARGIN\u104a FUN) X \u101e\u100a\u103a array \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a data block \u104f \u1021\u1019\u100a\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b MARGIN \u101e\u100a\u103a \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u101b\u1014\u103a \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1021\u1010\u102d\u102f\u1004\u103a\u1038\u1021\u1010\u102c\u1000\u102d\u102f \u1016\u1031\u102c\u103a\u1015\u103c\u101e\u100a\u103a (1 = [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R - Statorials \u1010\u103d\u1004\u103a apply(), lapply(), sapply() \u1014\u103e\u1004\u1037\u103a tapply() \u101c\u1019\u103a\u1038\u100a\u103d\u103e\u1014\u103a<\/title>\n<meta name=\"description\" content=\"\u1024\u101e\u1004\u103a\u1001\u1014\u103a\u1038\u1005\u102c\u1010\u103d\u1004\u103a \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c R \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a apply(), sapply(), lapply(), \u1014\u103e\u1004\u1037\u103a tapply() \u1010\u102d\u102f\u1037\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1025\u1015\u1019\u102c\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u1010\u1030 \u101b\u103e\u1004\u103a\u1038\u1015\u103c\u1011\u102c\u1038\u101e\u100a\u103a\u104b\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/my\/lapply-sapply-\u1014\u103e\u1004\u1037\u103a-tapply-r-\u1016\u103c\u1004\u1037\u103a-\u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101b\u1014\/\" \/>\n<meta property=\"og:locale\" content=\"my_MM\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R - Statorials \u1010\u103d\u1004\u103a apply(), lapply(), sapply() \u1014\u103e\u1004\u1037\u103a tapply() \u101c\u1019\u103a\u1038\u100a\u103d\u103e\u1014\u103a\" \/>\n<meta property=\"og:description\" content=\"\u1024\u101e\u1004\u103a\u1001\u1014\u103a\u1038\u1005\u102c\u1010\u103d\u1004\u103a \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c R \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a apply(), sapply(), lapply(), \u1014\u103e\u1004\u1037\u103a tapply() \u1010\u102d\u102f\u1037\u1000\u102d\u102f 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