How to graph two different functions on different axes

Hopefully I am asking this correctly. Is there a way to plot two different functions on two different axes in MATLAB? Say along the y-axis I want to plot the values of the function A(q). Along the x-axis, lets say I want to plot the function log(m). Thus, I want my plot to be log(m) by A(q), knowing that the function on each axis depends on two different variables.

[José-Luis]

Do you mean you want to plot a function of two variables?

Or are you trying to define a surface?

Answer 1

[Jan]

I do not know "plotting along an axis". I know 2D diagrams using two axes and plotting y against x. E.g.:

x = 1:0.01:2*pi;
y = sin(x);
plot(x,y);

But of course I can apply a function to x also:

I do not know "plotting along an axis". I know 2D diagrams using two axes and plotting y against x. E.g.:

t = 1:0.01:2*pi;
y = sin(t);
x = cos(t);
plot(x,y);

Or

plot(rand(1,10), rand(1,10))

So what is the problem? What does "plot to be log(m) by A(q)" exactly mean? Simply

plot(log(m), A(q))

[BM]

Essentially what I want to be able to do is plot q by A(q), and then plot the values of log(m) along the x-axis to see where the values of +/- log(m) intersect with A(q) on the x-axis. Does this make what I am trying to do a bit more clear?

[BM]

By 'plotting along the x-axis' I mean that the y-value is always zero.

[Jan]

As result you will get a line:

x = rand(1, 10);
plot(x, 0, 'o')

Then: yes, of course you can draw sets of points placed on 2 lines in one diagram.

I still do not understand the problem. Simply "plot q by A(q)", and then "plot the values of log(m) along the x-axis to see where the values of +/- log(m) intersect with A(q) on the x-axis." What happens if you simply try it?

[BM]

This is only a generalized part of a much larger program. I will think about it some more and come back here if I get stuck. Perhaps then, I will be able to pose a better question!