i have (y) with size of 7841000 and i mapped this y to get gex, gin , but the result shown only 1 dimension and i want that mapping for the two dimension (7841000),

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Hagar Hendy 2022-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/1857548-i-have-y-with-size-of-784-1000-and-i-mapped-this-y-to-get-gex-gin-but-the-result-shown-only-1-d

评论： Hagar Hendy 2022-11-21

i have (y) with size of 784*1000 and i mapped this y to get gex, gin , but the result shown only 1 dimension and i want that mapping for the two dimension (784*1000),

Rmin = 1e5

Rmax = 1e6

Gmin = 1.0/Rmax

Gmax = 1.0/Rmin

Input =table2array(in)

y=w{1}

for i = 1:length(y)

if y(i)>=0

gex(i) = Gmax*y(i) +Gmin*(1-y(i))

gin(i) =Gmin

disp(y(i))

disp (gex(i))

else

gex(i) =Gmin

gin(i) = -Gmax*y(i) +Gmin*(1+y(i))

end

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Answer 1

Voss 2022-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/1857548-i-have-y-with-size-of-784-1000-and-i-mapped-this-y-to-get-gex-gin-but-the-result-shown-only-1-d#answer_1106323

编辑：Voss 2022-11-20

在 MATLAB Online 中打开

Initialize gex and gin to be matrices the same size as y.

Then loop over all elements of y:

gex = zeros(size(y));
gin = zeros(size(y));
for i = 1:numel(y) % numel(y), not length(y)
    if y(i)>=0
        gex(i) = Gmax*y(i) +Gmin*(1-y(i));
        gin(i) = Gmin;
    else
        gex(i) = Gmin;
        gin(i) = -Gmax*y(i) +Gmin*(1+y(i));
    end
end

or use logical indexing instead of a loop:

gex = zeros(size(y));
gin = zeros(size(y));
idx = y >= 0;
gex(idx) = Gmax*y(idx) + Gmin*(1-y(idx));
gin(idx) = Gmin;
gex(~idx) = Gmin;
gin(~idx) = -Gmax*y(~idx) + Gmin*(1+y(~idx));