transform exponential number to decimal

Question

Alberto Acri 2023-9-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2019446-transform-exponential-number-to-decimal

回答： Steven Lord 2023-9-11

采纳的回答： David Hill

M1.mat

在 MATLAB Online 中打开

Hi. I have the following cell:

M1 = importdata("M1.mat");
A = compose('%d (%2d%%)', [M1(:,1), M1(:,2)]);

How can I turn exponential numbers (inside the brackets) into decimal numbers?

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Answer 1

David Hill 2023-9-11

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https://ww2.mathworks.cn/matlabcentral/answers/2019446-transform-exponential-number-to-decimal#answer_1307181

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M1.mat

M1 = importdata("M1.mat");
A = compose('%d (%3.2f%%)', [M1(:,1), M1(:,2)])
A = 5×1 cell array
    {'81 (6.18%)' }
    {'82 (7.51%)' }
    {'83 (9.03%)' }
    {'84 (10.20%)'}
    {'85 (9.43%)' }

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Answer 2

Steven Lord 2023-9-11

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https://ww2.mathworks.cn/matlabcentral/answers/2019446-transform-exponential-number-to-decimal#answer_1307186

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Use a different format specifier. The second column of your data doesn't contain integer values, so using %d for that column is not the right thing to do. Let's try %g instead and specify that you want three significant figures. See the documentation for the formatSpec input argument to the compose function for more information about the different format specifiers you can use.

% Sample data
M1 = [81, 6.18; 82, 7.51; 83, 9.03; 84, 10.2]
M1 = 4×2
   81.0000    6.1800
   82.0000    7.5100
   83.0000    9.0300
   84.0000   10.2000
S = compose("%d (%3g%%)", M1)
S = 4×1 string array
    "81 (6.18%)"
    "82 (7.51%)"
    "83 (9.03%)"
    "84 (10.2%)"