"???In an assignment A(I) = B, the number of elements in B and I must be the same."

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Anisa 2013-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/62785-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i-must-be-the-same

I have two matrix A & B. Matrix A size 1x1013 double and matrix B size 1x12931 double. I want to convert each element of matrix A into base-N from matrix B. For example, first element of matrix A converted into first element of matrix B, second element of matrix A converted into second element of matrix B, and so on.

mm = length(A);
nn = length(B);
base = cell(1,mm);
for ff = 1:mm;
  x(ff) = dec2base(A(ff),B(ff));
  base{ff} = x;
end

I got error:

???In an assignment  A(I) = B, the number of elements in B and  I must be the same."

How to fix it? Thank you.

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回答（1 个）

Image Analyst 2013-2-9

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/62785-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i-must-be-the-same#answer_74362

编辑：Image Analyst 2013-2-9

在 MATLAB Online 中打开

Use these lines:

for ff = 1:mm
  x(ff) = str2double(dec2base(A(ff),B(ff)));
  base{ff} = x(ff);
end

the issue was dec2base was returning a character string, not a number.

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Image Analyst 2013-2-9

Cast your A to int32 before you run the loop.

Anisa 2013-2-18

在 MATLAB Online 中打开

I already tried your solution, but still got the same warning. Why?

mm = length(A);
nn = length(B);
base = cell(1,mm);
x = zeros(1,mm)
for ff = 1:mm
  ff
  AA=A(ff)
  BB=B(ff)
  x(ff) = str2double(dec2base(int32(AA),int32(BB)));
  base{ff} = x(ff);
end