0 个投票

I have following code want cp Vs ct plot. How to plot it
clc;
clear all;
close all;
format long;
syms cp positive
for ct=0:0.05:1;
eqn = (1.38/(cp/ct)^2)-0.4151-(ct^3/cp^2) == 0
Root=vpasolve(eqn,cp,[0 1])
end

请先登录，再回答此问题。

 采纳的回答

Star Strider
Star Strider 2020-9-4

0 个投票

Try this:
format long;
syms cp positive
ctv=0:0.05:1;
for k = 1:numel(ctv)
ct = ctv(k);
eqn = (1.38/(cp/ct)^2)-0.4151-(ct^3/cp^2);
Root{k}=double(vpasolve(eqn,cp,[0 1]));
end
Root{cellfun(@isempty, Root)} = NaN;
figure
plot(ctv, [Root{:}])
grid
.

5 个评论
显示 3更早的评论 隐藏 3更早的评论

Aiden James
Aiden James 2020-9-10
Hi sir, sorry for late comment. I have tried above code but it is showing following error. I am using matlab version 2015
Error using sym/subsasgn
Invalid indexing assignment.
Error in Untitled13 (line 7)
Root{k}=double(vpasolve(eqn,cp,[0 1]));
Star Strider
Star Strider 2020-9-10
It runs without error in R2020a. I no longer have access to any R2015 version.
If you run my code exactly as I wrote it, it should work.
Aiden James
Aiden James 2020-9-10
Hello sir, I just removed data type "double" from code. Now it is giving correct graph as expected. Thanks for your help. I may need more help in upcoming 1-2 months. Thanks agian.
Star Strider
Star Strider 2020-9-10
As always, my pleasure!
Aiden James
Aiden James 2020-9-17
sir,may be you can help me ,plesae refer following link for my query-
How to plot contour with constraints
https://in.mathworks.com/matlabcentral/answers/594670-how-to-plot-contour-with-constraints?s_tid=srchtitle

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Line Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by