r - How to match elements of row with elements of a column and perform calculations on them in rstudio -

i want match columnname "name" dataframe list rowname of dataframe "volume" , perform calultion on columns.

can use match or row.match purpose.

i trying this

total <- as.data.frame(matrix(0, ncol = 5, nrow = 5)) (i in 1:5)  {   print(list$s.no[i] * 100)   (j in 1:5)      {     if (match(list$name, colnames(volume)), 2]))     value = total + volume[j]     print(value)     } } print(total)  

problem code:

total <- as.data.frame(matrix(0, ncol = 5, nrow = 5)) (i in 1:5)  {   print(list$s.no[i] * 100)   (j in 1:5)      {     if (match(list$name, colnames(volume)), 2]))     # match condition not correct. not know how call column header     value = total + volume[i]     # want add data matching column total     print(value)     }  } print(total)  

i want read first element in list$name match corresponding column, extract column , perform simple addition on , store result in dataframe "total". want same thing done elements in row individually.

list    s.no	name  2	ba  1	ar  5	ca  3	bl  4	bu    volume    ar	ba	bl	bu	ca	  -5.1275	1.3465	-1.544	-0.0877	3.2955	  -2.2385	1.5065	0.193	1.082	3.074	  -5.3705	1.1285	1.966	1.183	-1.9305	  -6.4925	1.5735	1.36	-0.0761	2.0875	  -5.068	0.9455	0.947	-0.7775	3.832	

i know can done after merging 2 files , using sapply function. since wanna use loop on dataframe "list" want compare 2 dataframes , store results separately dataframe everytime after loop over. merging files doesn't solve this.

the actual list dataframe consists of 23 records , actual volume dataframe consists of 18000 records.

i trying build function not sure loop necessary calculation. there better , easier way perform task?

i not sure have understood answer. think have correct code in way:

for (i in 1: length(list$name)) {     (j in 1:dim(volume)[2]) {         if(list$name[i]==colnames(volume[j])) total[,i]<-total[,i]+volume[,j]     } 

}