How do I list values of variables in legend?

Hi there,

I've written a script for a function which contains 3 variables (x,y,z).

z can be set as constant value, so the function can be plotted against x.

I'm trying to find a way of labelling my graph to indicate which curve belongs to which y-value (preferably using the legend function).

Any suggestions would be appreciated. Thanks!

Answer 1

[Image Analyst]

This is confusing. Show a graph with what you have so far. I don't know if you have a plot with 1, 2, or 3 curves on it and what the horizontal variable is and what the vertical dependent variable(s) is/are.

A curve will have many values usually. Let's say x and y are 100 elements long. Do you want all hundred values in the legend? You can use sprintf() to create strings which you can then send into legend(). Alternatively you can use text() to place a string with the value in it next to each marker.

[Maureen Laverty]

Thanks for your comment.

I've attached my graph so far.

The user input will determine number of elements in x and y arrays. A curve is plotted for each value in y array, hence number of curves will vary, depending on user input.

I need the legend to indicate which curve corresponds to which value in y array, so yes I want all values of y in legend

[Image Analyst]

Make a cell array of strings and then pass to legend.

for k = 1 : whatever
  ca{k} = sprintf('Curve #%d', k); % Make legend caption for this curve.
  x=...
  y=...
  plot(x, y, .....
  hold on;
end
legend(ca);

[Maureen Laverty]

Thanks! Worked perfectly.

[Khusro Kamaluddin]

Thanks A lot !!!! :D :D :D

[Arnab Roy]

Thank you! This works great. It could also work as follows (worked for me at least):

ca{k} = ['Curve #' num2str(k)];