r plotting multiple columns in df through a loop












0















a<-c(1,2,3,4) 

b<-c(1,2,3,4) 

c<-c(2,3,4,5)

f<-c(5,6,7,8)

p<-c(3,7,6,5)

df = data.frame(a,b,c,f,p)



for (i in c('c','f','p'))

    plot(df$a, df$i)


I am trying to use a loop to plot some columns of a df but df$columnName does not appear to select the correct columns.



I have also tried plot(a~i, df) and it does not work also. Please help!






r loops plot







share|improve this question

























  • Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

    – akrun
    Nov 27 '18 at 3:43


















0















a<-c(1,2,3,4) 

b<-c(1,2,3,4) 

c<-c(2,3,4,5)

f<-c(5,6,7,8)

p<-c(3,7,6,5)

df = data.frame(a,b,c,f,p)



for (i in c('c','f','p'))

    plot(df$a, df$i)


I am trying to use a loop to plot some columns of a df but df$columnName does not appear to select the correct columns.



I have also tried plot(a~i, df) and it does not work also. Please help!






r loops plot







share|improve this question

























  • Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

    – akrun
    Nov 27 '18 at 3:43
















0












0








0








a<-c(1,2,3,4) 

b<-c(1,2,3,4) 

c<-c(2,3,4,5)

f<-c(5,6,7,8)

p<-c(3,7,6,5)

df = data.frame(a,b,c,f,p)



for (i in c('c','f','p'))

    plot(df$a, df$i)


I am trying to use a loop to plot some columns of a df but df$columnName does not appear to select the correct columns.



I have also tried plot(a~i, df) and it does not work also. Please help!






r loops plot







share|improve this question
















a<-c(1,2,3,4) 

b<-c(1,2,3,4) 

c<-c(2,3,4,5)

f<-c(5,6,7,8)

p<-c(3,7,6,5)

df = data.frame(a,b,c,f,p)



for (i in c('c','f','p'))

    plot(df$a, df$i)


I am trying to use a loop to plot some columns of a df but df$columnName does not appear to select the correct columns.



I have also tried plot(a~i, df) and it does not work also. Please help!






r loops plot




r loops plot






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 27 '18 at 6:16









TeeKea

3,22851731




3,22851731










asked Nov 27 '18 at 3:38









TYLTYL

332216




332216













  • Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

    – akrun
    Nov 27 '18 at 3:43





















  • Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

    – akrun
    Nov 27 '18 at 3:43



















Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

– akrun
Nov 27 '18 at 3:43







Do you need matplot('colnames<-'(t(df[-1]), df$a), type = 'l')

– akrun
Nov 27 '18 at 3:43














1 Answer
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I don't think you can use the df$ style of indexing for some variable that holds a string. If you switch to square brackets for column indexing (making sure not to forget the empty row index to select all rows) then you can use a variable holding a column name.



The following works to make three plots of the variables in your vector:



par(mfrow=c(3,1))

for (i in c('c','f','p'))

    plot(df[,'a'], df[,i])





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    1 Answer
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    active

    oldest

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    active

    oldest

    votes






    active

    oldest

    votes









    1














    I don't think you can use the df$ style of indexing for some variable that holds a string. If you switch to square brackets for column indexing (making sure not to forget the empty row index to select all rows) then you can use a variable holding a column name.



    The following works to make three plots of the variables in your vector:



    par(mfrow=c(3,1))
    
for (i in c('c','f','p'))
    
    plot(df[,'a'], df[,i])





    share|improve this answer




























      1














      I don't think you can use the df$ style of indexing for some variable that holds a string. If you switch to square brackets for column indexing (making sure not to forget the empty row index to select all rows) then you can use a variable holding a column name.



      The following works to make three plots of the variables in your vector:



      par(mfrow=c(3,1))
      
for (i in c('c','f','p'))
      
    plot(df[,'a'], df[,i])





      share|improve this answer


























        1












        1








        1







        I don't think you can use the df$ style of indexing for some variable that holds a string. If you switch to square brackets for column indexing (making sure not to forget the empty row index to select all rows) then you can use a variable holding a column name.



        The following works to make three plots of the variables in your vector:



        par(mfrow=c(3,1))
        
for (i in c('c','f','p'))
        
    plot(df[,'a'], df[,i])





        share|improve this answer













        I don't think you can use the df$ style of indexing for some variable that holds a string. If you switch to square brackets for column indexing (making sure not to forget the empty row index to select all rows) then you can use a variable holding a column name.



        The following works to make three plots of the variables in your vector:



        par(mfrow=c(3,1))
        
for (i in c('c','f','p'))
        
    plot(df[,'a'], df[,i])






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 27 '18 at 3:59









        Brandon NedwekBrandon Nedwek

        513




        513
































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