plot2d1

plot2d1 — 2D plot (logarithmic axes) (obsolete)

Calling sequence

plot2d1(str,x,y,[style,strf,leg,rect,nax])

Parameters

str

: is a string of length three "abc".

a

: can have the following values: e, o or g.

`e`	: means "empty". Itspecifies the fact that the value of `x` is not used (the `x` values are supposed to be regularly spaced, ie 1:<number of rows of `y`>). The user must anyway give a value for `x`, 1 for instance: `plot2d1("enn",1,y)`.
`o`	: means "one". If there are many curves, they all have the same x-values: `x` is a column vector of size nl and `y` is a matrix of size (nl,nc). For example : `x=[0:0.1:2*%pi]'; plot2d1("onn",x,[sin(x) cos(x)])`.
`g`	: means "general". `x` and `y` must have the same size (nl,nc). Each column of `y` is plotted with respect to the corresponding column of `x`. `nc` curves are plotted using `nl` points.

b, c

: can have the values n (normal) or l (logarithmic).

`b=l`	: a logarithmic axis is used on the x-axis
`c=l`	: a logarithmic axis is used on the y-axis

x,y,[style,strf,leg,rect,nax] : these arguments have the same meaning as in the plot2d function.

opt_args : these arguments have the same meaning as in the plot2d function.

Description

This function is obsolete. Use plot2d instead.

plot2d1 plots a set of 2D curves. It is the same as plot2d but with one more argument str which enables logarithmic axis. Moreover, it allows to specify only one column vector for x when it is the same for all the curves.

By default, successive plots are superposed. To clear the previous plot, use xbasc.

Enter the command plot2d1() to see a demo.

Examples



// multiple plot without giving x
x=[0:0.1:2*%pi]';
plot2d1("enn",1,[sin(x) sin(2*x) sin(3*x)])
// multiple plot using only one x
xbasc()
plot2d1("onn",x,[sin(x) sin(2*x) sin(3*x)])
// logarithmic plot
x=[0.1:0.1:3]'; xbasc()
plot2d1("oll",x,[exp(x) exp(x^2) exp(x^3)])

Author

J.Ph.C.