Problem with the 2D-plot of a function
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Hello everybody,
i tried to plot a function. In it's final form, the only parameter of this function is "x".
When i try to plot this function, i get an error. Can you guys tell me where the problem is?
So lets say this is my function:
Varg_hat =
(1497527781869391849*x^2*exp(2*(-x*exp(-41/10))^(9/5))*exp(-41/5)*(-x*exp(-41/10))^(8 /5))/720575940379279360 + (232324954970675913*x*exp(2*(-x*exp(-41/10))^(9/5))*exp(-41/10)*log(-x*exp(-41 /10))*(-x*exp(-41/10))^(13/5))/720575940379279360
Now i want to plot this, by calculating this function for x-values from lets say 0 to 350 in 0.1-steps.
How can i do this?
I tried for example:
x=0:0.1:350;
plot(x,Varg_hat)
But then Matlab says:
Error using plot
Data must be numeric, datetime, duration or an array convertible to double.
Thank you for taking time to look over my question.
Sincerly, Ronald Singer
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采纳的回答
Walter Roberson
2017-10-16
syms x;
Varg_hat = (1497527781869391849*x^2*exp(2*(-x*exp(-41/10))^(9/5))*exp(-41/5)*(-x*exp(-41/10))^(8 /5))/720575940379279360 + (232324954970675913*x*exp(2*(-x*exp(-41/10))^(9/5))*exp(-41/10)*log(-x*exp(-41 /10))*(-x*exp(-41/10))^(13/5))/720575940379279360;
x=0:0.1:350;
y = double(subs(Varg_hat));
plot(x,real(y),'k', x,imag(y),'r')
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