pllllllllllllZzz ..... I need it today ;(
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*Hi evry body :)
can U help me to answer qustion num(c)? I don't Know how can i answer it :( PlZz help me =,(*
Exercise 2:
(a) Write an m-file named cosmx.m (“COS Minus X”) that defines the function:
(x) = cos x - x
Recall that a function m-file is one that starts with the word function. In this case it should start off as
function y = cosmx ( x )
% y = cosmx(x) computes the difference y=cos(x)-x
% your name and the date
y = ???
(This is very simple(the object of this exercise is to get going.)
(b) Now use your cosmx function to compute cosmx(1). Your result should be about -0.4597.
(c) Now use your cosmx function in the same plot sequence as above to plot cosmx and the horizontal axis on the interval -π < x < π. Hint: The horizontal axis is the line y = 0.
4 commentaires
Daniel Shub
le 26 Oct 2011
Great, so show us the function and then show us what you have done for part c.
Réponse acceptée
mon mon
le 26 Oct 2011
2 commentaires
Image Analyst
le 26 Oct 2011
How generous of you to accept your own "answer" instead of someone else who helped you.
Daniel Shub
le 26 Oct 2011
I think he may have accepted his answer prior to getting any help (with the possible exception of Amardeep's answer). It was accepted before I got involved.
Plus de réponses (4)
Daniel Shub
le 26 Oct 2011
ohhh, I know the answer ...
function y = cosmx ( x )
% y = cosmx(x) computes the difference y=cos(x)-x
% your name and the date
y = randn(size(x));
y(x == 1) = -0.4597;
3 commentaires
Amardeep
le 26 Oct 2011
Create a function which calls cosmx which should look something like. I have left out the plotting functions and the variable arraying to create plottable data.
x = -pi
while x=< pi
y=cosmx(x)
x=x+0.01 (or whatever division resolution you want along the x axis)
end
That should be more than enough to get you along the right lines for part c.
2 commentaires
mon mon
le 26 Oct 2011
2 commentaires
Daniel Shub
le 26 Oct 2011
If I asked you to evaluate cosmx at -pi, 0, and pi, how would you do that. What about if I asked you to evaluate cosmx between -pi and pi with steps of 0.01. Do you know how to plot anything?
try
doc plot
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