storing of values in matlab

lamda=1 N=6% alpha=60 alpha=deg2rad(alpha); d=0.5 Beta=(2*pi/lamda); theta= 0:0.012:2*pi; w=alpha+Beta*d.*cos(theta); AF=1/N*(sin(N*(w./2))./sin(w./2));

figure polar(theta,AF)

***************** I need the values of theta at different values of AF after plotting.

[Andrew Newell]

You already have theta and AF. What do you want to do with them?

Answer 1

[Paulo Silva]

change

polar(theta,AF)

to

h=polar(theta,AF)

After that code get the data like this

x=get(h,'Xdata')
y=get(h,'Ydata')

you can plot the data again but without the grid

plot(x,y)

[nitya ...]

can we do any operations on x, y after plotting

[Paulo Silva]

yes

[nitya ...]

how can we catch the values of y at different x values?

[nitya ...]

how can we display the value of x at a particular value of y?

[Paulo Silva]

x(y==value)

If the response is empty matrix than the value you tried doesn't exist on the y vector

[nitya ...]

here i want the value of y between 0.7 and 0.8 .

how can i write there?

[Paulo Silva]

y(y>=0.7 & y<=0.8)

[nitya ...]

but it gives all values of x again

[Jan]

As mentioned in your other thread: These basic questions are explained exhautively in the Getting Started sections of the documentation.

[nitya ...]

where i found the documentation?

[Paulo Silva]

Like Jan said you just need to execute:

doc

in the command line, F1 does the same, matlab window menu Help and Product Help

[nitya ...]

Thank you very much for your answers.