How to represent decimal number

a=180/255; in a matlab program and type 'a' in Command window, it shows the result as '0.7058823529411765' but when b=180; c=255; a=b/c; (which is doing the same function as above) and type 'a' in Command window, it shows the result as '1'

[James Tursa]

I don't think you are giving us the complete picture. E.g., on my computer:

>> b=180; c=255; a=b/c;
>> a
a =
   0.705882352941177

Please start over with a clean workspace, then type in the above and see what happens. I think you will get the expected results.

If you can reproduce your '1' with other code, please show us that code.

[Arun Prem]

Thanks for your response. My requirement is, in a Matlab program I have to find the maximum & minimum pixel value in an image and divide it by 255. So I have found the maximum & minimum pixel value using the command in a program. Below lines in a Matlab program.

New=imread('11.jpg');
Dif=rgb2gray(New);
[b,idx]=max(Dif(:));
[c,idx]=min(Dif(:));
a1=b/255;
a2=c/255;

After running the program, When I go to Command prompt and type,

b    =175
c    =114
a1   =1
a2   =0

But actually a1 and a2 values should be different....

Answer 1

[Steven Lord]

One or both of the variables b and c are of type uint8. See this documentation page for information about how integer arithmetic is performed.