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I am writing an FEM code in matlab. I want to make the sizes of repmat(N_dash, 3, 1) and repelem(ey.', 3, 1) the exact same. Original size of repmat(N_dash, 3, 1) is 3x3 and that of repelem(ey.', 3, 1) is 9x1. Any help will be much appreciated.

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Virajan Verma
Virajan Verma 2018-10-24
编辑： madhan ravi 2018-10-25
for epsilon3=-1:1:1
N_dash(1)=-0.5+epsilon3;
N_dash(2)=-2*epsilon3;
N_dash(3)=0.5+epsilon3;
end
ly=(x(5)-x(2)); (x,y,z are constants like 0.9876,0.8876..etc)
my=(y(5)-y(2));
ny=(z(5)-z(2));
lve=sqrt(((ly)^2)+((my)^2)+((ny)^2)); %%vertical length of element
ey = [ly; my; ny] / lve;
A=repmat(N_dash, 3, 1) .* repelem(ey.', 3, 1)

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madhan ravi
madhan ravi 2018-10-24
编辑：madhan ravi 2018-10-24
a=repelem(ey.', 3, 1)
a= reshape(a,3,3) %and then multiply a with repmat
A=repmat(N_dash, 3, 1) .* a
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Virajan Verma
Virajan Verma 2018-10-25
Yes i was really struggling. Its people like u who support others. Really thanks for ur valuable suggestions and time.

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