逗号分隔值的CSV文件的总列数

Question

我有以下命令，该命令将用空格分隔的列总计一个csv文件的列，如何使它与逗号分隔的值一起使用？

awk '{for (i=1;i<=NF;i++) sum[i]+=$i;}; END{for (i in sum) print "for column "i" is " sum[i];}' FileA

for column 1 is 8
for column 2 is 11
for column 3 is 7
for column 4 is 5