findtext.m returns undefined input argument error

[david1986]

dear all, i am MATLAB new user and i have some problems about it.

I generated a code as below:

function data = findtext(redc,greenc,bluec)
txt=0;
if bitand(redc,4)== 4
txt=bitor(txt,128);
end
if bitand(redc,2)== 2
txt=bitor(txt,64);
end
if bitand(redc,1)== 1
txt=bitor(txt,32);
end
if bitand(greenc,4)== 4
txt=bitor(txt,16);
end
if bitand(greenc,2)== 2
txt=bitor(txt,8);
end
if bitand(greenc,1)== 1
txt=bitor(txt,4);
end
if bitand(bluec,2)== 2
txt=bitor(txt,2);
end
if bitand(bluec,1)== 1
txt=bitor(txt,1);
end
data=txt;
return

I save it as findtext.m file but i get the error as below:

? Input argument "redc" is undefined.

Error in ==> findtext at 3
if bitand(redc,4)== 4

could anyone help to answer my question ? how to solve my problem ?

thanks so much

 

[Wrichik Basu]

How are you executing your function? You should type findtext(2,3,4) from the command line to run the function. Replace the numbers with your own values.