| Group: | Information and Control |
| See also: | list size |
| Function: | comp | |
| Description: | Checks whether an object has a specific component or not. If the first argument is a string, the object with the specified name is regarded as a list object. |
| Usage: | x = comp(obj, com) | |
| Input: | ||
| obj | list object or string | |
| com | string, the name of the component | |
| Output: | ||
| x | scalar | |
proc () = plot (z, d)
if (comp (z, "x") && comp (z, "y")) // check for existence
show (d, 1, 1, z.x~z.y)
endif
endp
d = createdisplay (1,1)
x = (1:100)/100
y = x^2
a = list (x, y)
plot (a, d)
a window with a plot of x^2
| Group: | Information and Control |
| See also: | list size |