Plotting Issue with code

Question

Giuseppe Rossi 2019-12-31

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/498546-plotting-issue-with-code

评论： Rena Berman 2020-1-16

Having problems with the plot of Temp vs XE,

X vs Temp

Temp vs Kc

X vs Kc

all produce plots which are expected but when XE is involved there isn't a plot produced..

Any advice?Code:

function 
%Given Data
To=325;
dH=-20000;
Cpa=20;
Cpb=20;
Kc1=1000;
R=0.001987;
dH1=-20; % dH x 10^-3
X=0:0.01:1.0;
plot(Temp,XE);

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Rena Berman 2020-1-16

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Answer 1

Bhaskar R 2019-12-31

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/498546-plotting-issue-with-code#answer_408237

MATLAB operator "/" does Solve systems of linear equations, use "./" operator instead for element wise division operation

function Plot5
%Given Data
To=325;
dH=-20000;
Cpa=20;
Cpb=20;
Kc1=1000;
R=0.001987;
dH1=-20; % dH x 10^-3
X=0:0.01:1.0;
%Derived Equations
Temp=325+((X*20000)/(40));
Kc=1000*(exp((-20/0.001987)*((1/305)-((1./Temp)))));
XE=((4.*Kc)-sqrt(((16*(Kc.^2))-(12*(Kc-4).*Kc))))./(2.*(Kc-4));    % changed / to ./
plot(Temp,XE);