# I want to change the symbolic variables in my matrix to numbers

조회 수: 5 (최근 30일)
Charles 2024년 4월 17일
댓글: Star Strider 2024년 4월 17일
To make it simpler to explain, I just want to plot the results of this final matrix. But it gives me zero as the answer because it is in a symbolic format. Is there a way to change it to the actual value ?
clear all ; close all; close ; clear
syms s
Expr = (sin(s));
F1 = int(Expr)
F1 =
syms n
expr2 = 1/n ;
F2 = int(expr2)
F2 =
total = F2 == F1
total =
final = isolate(total,n)
final =
want2plot = subs(final,s,0:0.1:5)
want2plot =

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### 채택된 답변

Star Strider 2024년 4월 17일
편집: Star Strider 2024년 4월 17일
Use the fplot function —
clear all ; close all; close ; clear
syms s
Expr = (sin(s));
F1 = int(Expr)
F1 =
syms n
expr2 = 1/n ;
F2 = int(expr2)
F2 =
total = F2 == F1
total =
final = isolate(total,n)
final =
want2plot = subs(final,s,0:0.1:5)
want2plot =
figure
fplot(rhs(final), [0 5])
grid
xlabel('s')
ylabel('n')
title('‘fplot’')
Alternatively —
nfcn = matlabFunction(rhs(final))
nfcn = function_handle with value:
@(s)exp(-cos(s))
figure
plot((0:0.1:5), nfcn(0:0.1:5))
grid
xlabel('s')
ylabel('n')
title('‘matlabFunction’')
figure
plot(0:0.1:5, double(rhs(want2plot)))
grid
xlabel('s')
ylabel('n')
title('‘want2plot’')
EDIT — Added the ‘Alternatively —’ section.
EDIT — (16 Apr 2024 at 12:33)
.
##### 댓글 수: 2없음 표시없음 숨기기
Charles 2024년 4월 17일
Thank you very much!! That makes sense, i saw somewhere that you could use the rhs and lhs for stuff but didn't think of using it like this to get the answer.
Star Strider 2024년 4월 17일
As always, my pleasure!
(I added some asethetic tweaks to my original post. Code unchanged.)

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