MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply Today
Asked by mohsen on 19 Nov 2012

>> x=0.7; % x is fixed value

>> syms s % s is symbols

>> v=char(x./(s^2+1)); % v is function of (x,s)

% numerical method to compute inversion Laplace transformation

% this function is available through remark at below

>> [t1,ft1]=INVLAP(v,0.0001,5,1000,6,39,89);

>> plot(t1,ft1)

please, help me the previous small code run easily, but i need (x not equal fixed), i.e., i need x- run over the interval (0:0.1:1), and also make all the following steps, then make 3-D figures between mesh(x,t1,ft1)

% remark

% INVLAP Numerical Inversion of Laplace Transforms

*No products are associated with this question.*

Answer by bym on 19 Nov 2012

seems like a simple 'for loop' would do the trick

x = 0:.1:1;

for x v=char(x./(s^2+1)); % v is function of (x,s) % modify call to INVLAP to store ft1 in a matrix ... end

mesh(...)

mohsen on 20 Nov 2012

thank u, i do the step which u refer to it in your answer but their exist error and the following message is appeared

??? Error using ==> mesh at 80

Z must be a matrix, not a scalar or vector.

code according to your vision

for x=0:0.1:1;

syms s % s is symbols

v=char(x./(s^2+1)); % v is function of (x,s)

% numerical method to compute inversion Laplace transformation

% this function is available through remark at below

[t1,ft1]=INVLAP(v,0.0001,5,1000,6,39,89);

end

mesh(x,t1,ft1)

## 1 Comment

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/54178#comment_112132

thank u, i do the step which u refer to it in your answer but their exist error and the following message is appeared

??? Error using ==> mesh at 80

Z must be a matrix, not a scalar or vector.

code according to your vision

for x=0:0.1:1;

syms s % s is symbols

v=char(x./(s^2+1)); % v is function of (x,s)

% numerical method to compute inversion Laplace transformation

% this function is available through remark at below

[t1,ft1]=INVLAP(v,0.0001,5,1000,6,39,89);

end

mesh(x,t1,ft1)