Question

MATLAB101 help D:
I'll attached the problem below.

Answer 1

I just wanted to see how this will look like. Don't show me the code (I have to figure this one out), just show me your output, so that I can have an idea.

Answer 2

...a little bit of hints, maybe?

Answer 3

okay so

Answer 4

u have a 50 by 50 matrix and what are we trying do here with peaks function?

Answer 5

from what I understand, i have to make the 50 by 50 matrices using the "peaks" function. What's a peak function anyway?

Answer 6

www.mathworks.com/help/matlab/ref/peaks.html

Answer 7

Yeah I read that. I'm not sure if I should do
Z=peaks(x,y) or do z=peaks(50), x=peaks(50), y=peaks(50)

because it says "Use the peaks function to define X,Y,Z" not sure what this part actually means

Answer 8

im looking it up

Answer 9

do u hae some data set of some function i can use peaks on?

Answer 10

I believe you should be using the Z=peaks(x,y)

Answer 11

dont quote me but im pretty sure

Answer 12

okay

Answer 13

what is x and y

Answer 14

no i don't have any set of data..

if i did that, this is how it will look like:

Answer 15

is it supposed to be like that? O.o

Answer 16

Z = peaks(X,Y); evaluates peaks at the given X and Y (which must be the same size) and returns a matrix the same size.

Answer 17

so if im not misinterpreting that your x and y are 50

Answer 18

x and y are both 50 by 50 matrices?

Answer 19

gimme a second lol i may be mistaken

Answer 20

oh crapp i cant use peaks i accidentally named some other program peaks, i gotta put in that program in for peaks again

Answer 21

wait i'm confused now, do i need to define x and y with some function?

Answer 22

can you open your peaks function code

Answer 23

well if we are basing it off the definition then yes you have to define the x and y and they both must be the same value

Answer 24

ok nvm i just renamed the file i can use peaks again

Answer 25

http://prntscr.com/8pzvg0

Answer 26

like that?

Answer 27

yup thats what it should look like from what i have knowledge of

Answer 28

did you do
z=peaks(50)
figure
mesh(Z) ?

Answer 29

>> [X,Y,Z]=peaks(50)
>> surf(X,Y,Z)

Answer 30

surf(x,y,z)
isn't the x and y here represents the matrix then z will be the color of data and the surface height? okay. thank you, i think i got it now :D

Answer 31

[X,Y,Z] = peaks(...); returns two additional matrices, X and Y, for parametric plots, for example, surf(X,Y,Z,del2(Z)). If not given as input, the underlying matrices X and Y are

[X,Y] = meshgrid(V,V)

Answer 32

u should mess around with it like

Answer 33

what happens when you put in a meshed grid 50 by 50 for peaks

Answer 34

ok, i'll try that. I already get the idea, so I think I can manage it now
I'll ask again if I got stuck or confused :P

Answer 35

quick question, are your matrices like the list of numbers/data showing on your command window?