For-loop show an element which has format number different with others in an array?

Hi,

Could someone explain a strange thing happend in my simple code?

numwl='11';
chieuchimd='1';
dwl=str2double(chieuchimd)/(str2double(numwl)-1);
mwl=[0:dwl:str2double(chieuchimd)]*1000;
text3={};
for i=1:str2double(numwl)
    text3=[text3;{sprintf('%d',i-1)} {sprintf('DN%d',i-1)} {sprintf('%d',mwl(i))}]
end

When for-loop at i=4, the 3rd colum of the cell had a number that its format different with others.

I also search but had no answers.

Thanks

Answer 1

[Thorsten]

This is because mwl is not exactly 300 but 300 + 5.6843e-014.

Either use

mwl = round([0:dwl:str2double(chieuchimd)]*1000);

or

mwl = [0:dwl*1000:str2double(chieuchimd)*1000];

[Khanh]

Thank you so much. My number array is exactly with interval is 100 (0:100:1000). But I also solved the problem by using your code. Thanks again :D.