How to draw exponential function in matlab

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Chris Lin
Chris Lin 2021-8-7
评论： Walter Roberson 2021-8-11
Does anyone know how to draw this function f(x)=sin(x). Exp(-lxl) in Matlab?Thanks.

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回答（2 个）

Dave B
Dave B 2021-8-7
Ran in:
It seems like you listed a couple of functions, were you looking to plot them separately?
Can plot the functions using fplot
nexttile
fplot(@(x)sin(x))
nexttile
fplot(@(x)exp(-abs(x)))
Or plot values using plot
nexttile
x=linspace(-5,5,100);
plot(x,sin(x))
nexttile
plot(x,exp(-abs(x)))
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Dave B
Dave B 2021-8-11
Hi Chris, can you expand on your question a bit?
Walter Roberson
Walter Roberson 2021-8-11
nexttile means to move to the next sub plot. It is a more modern way of using subplot() that has some advantages.

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Chris Lin
Chris Lin 2021-8-7
Thanks,How to define the area of X from minus 10 to plus 10
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Walter Roberson
Walter Roberson 2021-8-8
Ran in:
format long g
y = @(x,k) sin(x).*exp(-abs(x)).*exp(-i.*k.*x)
y = function_handle with value:
@(x,k)sin(x).*exp(-abs(x)).*exp(-i.*k.*x)
syms x k
area_sym = simplify(int(y(x,k), x, -10, 10))
area_sym = 
area_k_sym = simplify(subs(area_sym,k,(1:8).'))
area_k_sym = 
double(area_k_sym)
ans =
0 - 0.799941726389522i 0 - 0.400020854904531i 0 - 0.141179603605318i 0 - 0.0615282799753523i 0 - 0.0318073184754602i 0 - 0.0184532189656321i 0 - 0.0116468126495915i 0 - 0.00780451904492856i

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