MATLAB: Charecter to binary form

asciibinarycharecterconvert

I have a character A. I converted this into a binary form(say B). I need to perform some operations using B. While doing this I need to check whether the element B(1)=1 or 0.

For doing so, I write

if B(1)==1

But it doesn't work. It works when I written like this-

if B(1)=='1'

What is the reason? Please tell me…

Best Answer

You are comparing the char '1' with the numeric 1.

>> double('1')
ans =
    49

as in the ASCII table.

You have to rescale '1' to 1:

'1'-'0' == 1

and in your case

B(1)-'0' == 1

Related Solutions

MATLAB: Input A of class cell and input B of class double must be cell arrays of strings, unless one is a string

You can get a matrix of what element of A matches what element of B using isequal() and iterating over all possible comparisons/pairs.

A= {...
  89830410
  50590220
  '33762X10'
  '02837P30'
  57832110
  '25037Y10'
  13063010
  '09972F10'}
B={...
  89830410
  50590220
  '33762X10'}
lenA = length(A);
lenB = length(B);
matches = false(lenA, lenB);
for ka = 1 : lenA
  for kb = 1 : lenB
    if isequal(A(ka), B(kb))
      matches(ka, kb) = true;
    end
  end
end
% Print to command window:
matches

Results:

matches =
     1     0     0
     0     1     0
     0     0     1
     0     0     0
     0     0     0
     0     0     0
     0     0     0
     0     0     0

This will work regardless if the contents of the cells of A and B are strings or numbers. The output matches matrix is basically saying that A(1) matches B(1), A(2) matches B(2), and A(3) matches B(3).

MATLAB: How can i create a array of letters from a sentence

txt="Here's to ...";       % truncated for brevity of posting but contains above as string variable...

Engine:

t=char(txt).';                               % convert string to column char() array
vs=cellstr(unique(t));                       % unique characters found in text (variables)
cn=vs;                                       % category names the same ... except
cn(1)={'\b'};                                % need a unique name for a blank
c=categorical(t,vs,cn)                       % and build the categorical array
figure
hHG=histogram(c);                            % draw nice histogram
hAx=gca;
hAx.XTickLabelRotation=0;                    % turn labels upright since they're short
nCounts=hHG.Values;                          % return counts

Easy look-see is

>> summary(c)
     \b               100 
     '                  3 
     ,                  4 
     .                 14 
     A                  3 
     B                  2 
     H                  1 
     T                  7 
     Y                  1 
     a                 22 
     b                  3 
     c                 12 
     d                 10 
     e                 70 
     f                  9 
     g                 11 
     h                 40 
     i                 17 
     k                  2 
     l                 11 
     m                 10 
     n                 26 
     o                 33 
     p                  5 
     q                  3 
     r                 24 
     s                 29 
     t                 34 
     u                 16 
     v                  2 
     w                  8 
     y                 14 
     z                  3 
>>

Best Answer

Related Solutions

MATLAB: Input A of class cell and input B of class double must be cell arrays of strings, unless one is a string

MATLAB: How can i create a array of letters from a sentence

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