Unable to perform assignment because the left and right sides have a different number of elements

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KIPROTICH KOSGEY
KIPROTICH KOSGEY 2021-2-24
回答： Rashed Mohammed 2021-3-1
Hi,
Please i keep getting the above error when i try to run the below code. Please can someone assist. Thanks
x=[1680 1190 841 595 420 297 210 149 105 74.4 52.5 37.2 26.3 18.6 13.1 9.29 6.57 4.65 3.28 ...
2.32 1.64 1.16 0.821 0.581 0.00];
y=[99.872 98.945 95.538 88.050 76.599 62.936 49.281 37.107 27.087 19.425 13.696 9.996 7.296 5.325 ...
3.886 2.837 2.070 1.511 1.103 0.805 0.588 0.429 0.313 0.228 0.000];
a=3.79; b=3.31; c=0.36; d=0.54; f=1.11; g=0.24;Dc=0.5; h=1.5; Di=0.1; Do=0.083; Du=0.058; H=3; fi=0.198;
S=a*(Du/Do)^6*(Du^2+Do^2)^c*h^d*exp(0.54*fi)/(Dc^f*H^g);
F=50;
Rv=S/(S+1);
a1=2.69*10^3; b1=0.46; c1=0.6; d1=1.21; f1=0.71; g1=0.38; i1=0.45; ps=1841.525; pf=1000; Q=0.09352;
d50c=a1*Dc^b1*Di^c1*Do^d1*exp(6.3*fi)/(Du^f1*h^g1*Q^i1*(ps-pf)^0.5);
a2=2.96; b2=0.15;
lambda=a2*(Dc^2*h/Q)^b2*exp(-1.58*Rv);
x1=x./d50c;
edp=1-exp(-0.693.*x1.^lambda);
syms x y
summation=symsum(edp.*y/100*F);
Rf=(Rv-fi)*summation;
alpha=Rf;
cdp=alpha+(1-alpha).*edp;
Rs=symsum(cdp.*y./100*F);
pio=(1-cdp*y*F)./(symsum((1-cdp.*y*F)));
piu=(cdp*y*F)./(symsum((cdp.*y*F)));
ezplot(Rs);

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回答（1 个）

Rashed Mohammed
Rashed Mohammed 2021-3-1
Hi @KIPROTICH KOSGEY
Usage of ezplot function is not recommended. Please use fplot function. If you have a usecase which fplot or fimplicit functions do not satisfy and have to use ezplot, please share with us so that we can help you.
Hope this helps.

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