How to transform function in MatLab? Shift, Scale etc.
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If I have a function as follows:
syms x1;
syms t;
x1 = exp(t)* Heaviside(2*t);
How do I do define x2 = x1(t-2) so I can plot it. I would rather not have to redefine the entire function doing the work myself each time I want to do a transformation. Is there a way of achieving this?
1 个评论
Preetha Thanunathan
2020-4-7
I have a function f(x) whose range is the interval [0, 1], and I need to shift it and stretch it so that the range is now the interval [a, b]. Find a function g(x) (defined in terms of f(x)) so that g(x) has an range [a, b].
In Matlab, the rand command produces a random number between 0 and 1, under the uniform distribution; that's different from the normal distribution. The graph of the uniform probability distribution is a horizontal line. The graph of the normal distribution is the bell curve.
I need a program that will accept input values a and b, a < b, and will output a random number between a and b, You'll do this by shifting and stretching the rand function. Notice that in Matlab the rand function doesn't take an input. You just type rand and hit enter, and the program will spit out a random number between 0 and 1.
can anyone answer this question
回答（3 个）
ha9981
2012-9-23
1 个投票
2 个评论
Wayne King
2012-9-23
ahh yes, I forgot about subs!
Azzi Abdelmalek
2012-9-23
编辑：Azzi Abdelmalek
2012-9-23
If you want to delay with t0, compute x(t) then plot(t+t0,x)
Wayne King
2012-9-23
编辑：Wayne King
2012-9-23
I don't know of a shift operator for symbolic functions.
syms t
tprime = t-2;
x1 = exp(t)*heaviside(2*t);
x2 = exp(tprime)*heaviside(2*tprime);
Or just:
x2 = exp(t-2)*heaviside(2*(t-2));
Azzi Abdelmalek
2012-9-23
编辑：Azzi Abdelmalek
2012-9-23
syms t x
x1 = exp(t)* heaviside(2*t);
t=0:.1:10
if you want to plot |x1(t-2)| then
y=eval(x1)
t=t+2 % not t=t-2 because it's a delay
close;plot(t,y)
set(gca,'xlim',[0 max(t)])
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2020-4-7
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