Hi, I need urgent help,the sum value in following program is not getting incremented..whatever 'm' value is there,sum is showing that.the next sum value is not getting added with the previous value.I here by attach the code.

function [y,sum]= fcn(u,v)
%#codegen
w=length(u);
sum=0;
y=0;
for i=1:w
    if u>v
    m=u-v;
else m=0;
   end
   sum=sum+m;
    if (u+sum)>v
        y=v;
       else
        y=(u+sum);
    end
end

[Stephen23]

Smruti Prasad Dash's "Answer" moved here:

I am taking the value of u and v from outside.if u>v, I am storing the excess value in m, and giving output as "v".Each time this condition satisfies, I want to store the value of 'm' in 's'(which is the only problem I am having).

Then if u<v,"m"=0 it checks if "s+u">"v",if yes then output is" v "else "u+s"

modified code:

function [y,s]= fcn(u,v)
%#codegen
s=0;
if u>v
    m=u-v;
    else m=0;
end
s=s+m;
if (u+s)>v
    y=v;
else y=(u+s);
end

this is also giving me the same output as previously.I am not getting any errors but i am not getting required output.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Image Analyst]

Do not use sum as the name of your variable. It is the name of a built-in function.

Step through your function with the debugger: http://blogs.mathworks.com/videos/2012/07/03/debugging-in-matlab/ so you can see what lines of code are, or are not , being executed.

Explain in words what you want to do. There's a good chance it can be accomplished in a vectorized manner instead of using for loops and if statements.