How to multiply 4 columns together in a 40x7 table

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Alex Jones
Alex Jones 2020-4-20
回答： BALAJI KARTHEEK 2020-4-20
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?
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Alex Jones
Alex Jones 2020-4-20
I have worked out a way to do this but I am now getting: Operator '.*' is not supported for operands of type 'cell'.
How do I fix this as I am multiplying within a table?
Ameer Hamza
Ameer Hamza 2020-4-20
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.

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回答（1 个）

BALAJI KARTHEEK
BALAJI KARTHEEK 2020-4-20
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)

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