Simplify Matrix decimal to integers

M = [881/2158       985/1393       780/1351  
     881/2158      -985/1393       780/1351  
    -881/1079             0        780/1351]
M = 3×3
    0.4082    0.7071    0.5774
    0.4082   -0.7071    0.5774
   -0.8165         0    0.5774
ip = find(M>=0);
in = find(M<0);
M(ip) = ceil(M(ip));
M(in) = floor(M(in));
disp(M)
     1     1     1
     1    -1     1
    -1     0     1

Don't know where you got the -2 from though!

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Shaunak Bagade 2021-10-19

I don't want to round the numbers ... I need to simplify it like 881/2158 is common factor in column 1 ... 985/1393 in column 2 ... 780/1351 in column 3

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Answer 2

Cris LaPierre 2021-10-19

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https://ww2.mathworks.cn/matlabcentral/answers/1566993-simplify-matrix-decimal-to-integers#answer_811818

编辑：Cris LaPierre 2021-10-19

在 MATLAB Online 中打开

It's likely going to take two functions: one to convert your symbolic expressions to numeric, and a second to round.

I would probably do something like

new_var = round(double(old_var))

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Steven Lord 2021-10-19

在 MATLAB Online 中打开

Or you could normalize by the first element in each column.

M = [881/2158       985/1393       780/1351  
     881/2158      -985/1393       780/1351  
    -881/1079             0        780/1351];
B = normalize(M, 1, 'scale', 'first') % Normalize in dimension 1
B = 3×3
     1     1     1
     1    -1     1
    -2     0     1