How to find the minimum value of a column in R

Question

I am new in R and I am trying to do something really simple  I had load a txt file with four columns and now I want to get the minimum value of the second column  This is the code that I have       Choose the directory of the file   setwd    Users  dkar  Desktop        Read the txt file   data lt -read table  export v2 txt  sep    header T    str data        this command gives me the minimum for all 4 columns    a lt -apply data 2 min    Actually  if I want to do something like this   min  data   2    But I don t know how to do it in R  Any help

User · Answer

df  lt - read table text                  X  Y              1  2  3              2  4  5              3  6  7              4  8  9              5 10 11                header   TRUE    y min  lt - min df   Y       Corresponding X value x val associated  lt - df df Y    y min   X    x val associated   First  you find the Y min using the min function on the  Y  column only  Notice the returned result is just an integer value  Then  to find the associated X value  you can subset the data frame to only the rows where the minimum Y value is located and extract just the  X  column    You now have two integer values for X and Y where Y is the min

User · Answer

If you need minimal value for particular column  min data  2     Note   R considers NA both the minimum and maximum value so if you have NA s in your column  they return  NA   To remedy  use   min data  2   na rm T

User · Answer

If you prefer using column names  you could do something like this as an alternative   min data column name

User · Answer

Since it is a numeric operation  we should be converting it to numeric form first  This operation cannot take place if the data is in factor data type  Check the data type of the columns using str     min as numeric data  2

[r] How to find the minimum value of a column in R?

Examples related to r