Practical R for Biologists by unknow

Author:unknow
Language: eng
Format: epub
Publisher: CAB International

Tool Box 15.1

• Use apply(filename, 1, sum) to calculate the sum of rows.

• Use apply(filename, 2, mean) to calculate the mean of columns.

• Use colMeans() to calculate the means of columns.

• Use colSums() to calculate the sums of columns.

• Use family= to specify the error distribution for a glm.

• Use glm() to calculate the amount of variance explained by the variables.

• Use h= in abline to set a line as horizontal.

• Use jitter() in plot to separate coincident points so that they appear distinct.

• Use mar= in par to set the margins.

• Use rowMeans() to calculate the means of rows.

• Use rowSums() to calculate the sum of rows.

• Use split() to separate values in a vector according to a supplied list of factors.

• Use v= in abline to set a line as vertical.

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