couldn't find what's wrong

Question

amira hl 2015-6-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/222733-couldn-t-find-what-s-wrong

编辑： Walter Roberson 2015-6-6

this is my code

clc; clear all; close all;
im=imread('images.jpg');
size(im);
fid=fopen('document.txt','r');
c = fread(fid, 'uint8=>char')';
bin=dec2bin(c);
a=size(bin,1)*size(bin,2);
b=1
delta=20
wi=bin(3)
f=im(3,3)
m=floor(f/((2^b)*delta))
r=f-(2^b)*m*delta
f1=(2^b)*m*delta+wi*delta+r/(2^b)
in execution
b =
       1
delta =
      20
wi =
1
f =
      7
m =
      0
r =
      7
f1 =
    255

the value of f1 should be 24

I think the problem is in saving wi=bin(3) value in matlab because when I put wi=1; manually in my code it gives me 24 but my main code involves a loop and every time wi will take a new value from bin table

why is f1=255??

thank you