MATLAB: Finding negative numbers and showing where they are

Question

Thomas Mroczkowski 2020-12-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/689089-matlab-finding-negative-numbers-and-showing-where-they-are

评论： Walter Roberson 2020-12-10

load Saturated_Table % load tables
load SpecificHeat_Data
SAT = SaturatedTable; % storing the tables as variables
SH = SpecificHeatData;
 
NNeg = SaturatedTable(1:end , 2:end); % Selects 1st rown to the end, 2nd colum to the end of the table
%mustBeNonnegative(NNeg) %states that the values above must be nonnegative
if NNeg<0 
   disp(neg)
end 

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Answer 1

Walter Roberson 2020-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/689089-matlab-finding-negative-numbers-and-showing-where-they-are#answer_570879

在 MATLAB Online 中打开

[row, column] = find(NNeg < 0)

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Walter Roberson 2020-12-10

在 MATLAB Online 中打开

while true
    [row, column] = find(NNeg < 0, 1);
    if isempty(row); break; end
    newval = input( sprintf('Input non-negative for row %d column %d: ', row, columN);
    if isnumeric(newval) && isscalar(newval)
        NNeg(row, column) = newval;
    end
end