# How to multiply 4 columns together in a 40x7 table

3 views (last 30 days)
Alex Jones on 20 Apr 2020
Answered: BALAJI KARTHEEK on 20 Apr 2020
Hi,
How do I multiply 4 columns of a table together and then output the answer in another column inside the same table. Additionally how do I repeat this for all 40 lines of the table?
Ameer Hamza on 20 Apr 2020
Alex, as you mentioned, the variables are of type cell and double. At best, we can make a guess, but the suggested solution that will probably not work. It will be better if you can attach a sample table, similar to the original table you have. It will make it much easier to suggest a solution quickly.

BALAJI KARTHEEK on 20 Apr 2020
Hope this will help u out.....
in variable a u keep ur input matrix and in while size(a,2)<7: instead of 7 u keep ur no of required columns in ur case it is 41, if u have any furher doubts u can feel to contact me
clc
clear all
format long
a= [1 2
1 2
1 2];
while size(a,2)<7
for i=1:size(a,1)
b(i)=1;
for j=1:size(a,2)
b(i)=b(i)*a(i,j);
end
end
a(:,size(a,2)+1)=b;
end
display(a)

R2020a

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