Output standard deviation and Mean

Question

Christopher Clarke 2020-6-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/540926-output-standard-deviation-and-mean

评论： Christopher Clarke 2020-6-2

When i run my programme, how do i only output the fprintf values?

function [VSD,M] = mean_stdev(A)
    A=input('N numbers:')
    
    % This function calculates the mean and standard deviation without
    %   using in-built functions
som=0;
for i=1:length(A)
  som=som+A(i);
end
M=som/length(A) %the mean
fprintf('Mean is: %f\n', M)
moy=0;
for i=1:length(A)
    moy = (A(i)- M)^2;
    moy = (moy)/length(A);
end
VSD=sqrt(moy/length(A)) %Varaince
fprintf('stadard dev: %f\n',VSD)
end

The output

>> mean_stdev
N numbers:
[5 6 7 8]
A =
     5     6     7     8
M =
    6.5000
Mean is: 6.500000
VSD =
    0.3750
stadard dev: 0.375000
ans =
    0.3750
>> 

1 个评论
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August Hardie 2020-6-2

在 MATLAB Online 中打开

Add semicolons at the end of statements to suppress output.

A=input('N numbers:') ;
M=som/length(A) ; %the mean
VSD=sqrt(moy/length(A)) ; %Varaince

Lastly, to suppress the 'ans' output, add a semicolon to the end of your function ' mean_stdev( ) ; ' whenever calling it.

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Answer 1

David Hill 2020-6-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/540926-output-standard-deviation-and-mean#answer_445280

编辑：David Hill 2020-6-2

在 MATLAB Online 中打开

Function call. I would do the printing after the function call returns. But, this should work for you.

[s,m]=mean_stdev();

After function call returns.

A=input('N numbers:');
[VSD,M]=mean_stdev(A);
fprintf('Mean is: %f\n', M);
fprintf('stadard dev: %f\n',VSD);
function [VSD,M] = mean_stdev(A)
som=0;
for i=1:length(A)
  som=som+A(i);
end
M=som/length(A); %the mean
moy=0;
for i=1:length(A)
    moy = (A(i)- M)^2;
    moy = (moy)/length(A);
end
VSD=sqrt(moy/length(A)); %Varaince
end