How to save .mat file in a function?

Question

tedy 2013-4-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69650-how-to-save-mat-file-in-a-function

Hello, i have a function, i wanna save the result to .mat file. i try to execute save example.mat result , but i doesn't work. what should i do? this is my function

function result=plus(images)
[rmax, cmax] = size(images);
  for row = 1:rmax;
    for col = 1:cmax;
    
    if images(row,col)== 1 
    a=14;
    b=2;
    result=a+b
    end
    end
  end
  save example.mat result

I purposely don't add a semicolon in the "result = a + b", in order to show the row and column which produces number 16

thanks in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Carlos 2013-4-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69650-how-to-save-mat-file-in-a-function#answer_80831

在 MATLAB Online 中打开

Your last line should be

save('example.mat', 'result');

3 个评论
显示 1更早的评论隐藏 1更早的评论

Matt Kindig 2013-4-3

It's unclear what you expect 'result' to be. You define 'result' to be a+b, which will always give you 16 since you have defined a=14 and b=2. In what sense does your code not work?

tedy 2013-4-3

i'm not focus on the value of result. it's free to be what you want 16,12,3,5.., and so does the a&b value, it's free to be what you want 1,3,4.. i just wondering, why example.mat only has matrix 1x1, whereas the results has so many number

请先登录，再进行评论。

Answer 2

Walter Roberson 2013-4-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69650-how-to-save-mat-file-in-a-function#answer_80867

在 MATLAB Online 中打开

You are writing over all of the variable "result" on every iteration of the loop. Try

result(row, col) = a+b;

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

tedy 2013-4-4

Thank you for your reply, but it takes all the row and col. How to display only the calculation of a+b and also the matrix contain only the calculation? for example the results are 16,16,16,16.. so, the matrix also only contain 16,16,16,16.. not all the row and col

请先登录，再进行评论。