Loop and write into a cell

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Mark S 2020-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/515261-loop-and-write-into-a-cell

关闭： MATLAB Answer Bot 2021-8-20

Hello, i wanna accumulate the data in my script with a loop

l=[1,2,3,4,5,6,7,8,9,10]
S=[42600 35000 91850 20000 41060 30000 63100 10000 38500 30000]';
P=[65 840 50 176 48 638 14 130 32 45]';
X=S .* P;
sort(X,'descend');
a=sum(X);
p=cell(10,1);
c=cell(10,1);
for k=1:10
    p{k}= (X(k)/a)*100
end
for k=1:10
c{k}=sum(p(1:,k) 1))
end

In this loop i wanna accumulate my data p and write it to the cell c.

for k=1:10
c{k}=sum(p(1:,k) 1))
end

But i get the error:

c{k}=sum(p(1:,k) 1))

↑

Error: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched

delimiters.

What is wrong here?

回答（1 个）

ME 2020-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/515261-loop-and-write-into-a-cell#answer_423902

编辑：ME 2020-4-4

This part of your code:

for k=1:10
c{k}=sum(p(1:,k) 1))
end

has two open (left) brackets and three close (right) brackets - so you have mismatched delimiters as suggested in your error message.

You might just need to be careful with the data type of p. If you use ‘class()’ then you can check what data type your p commands are. You can then look up the Matlab documentation online for the acceptable classes for the sum command.

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