plot2d2 2D plot (step function)

## Syntax

    plot2d2([x],y)
                plot2d2([x],y,<opt_args>)
                plot2d2([logflag],x,y,[style,strf,leg,rect,nax])

## Arguments

args

  see `plot2d` for a description of parameters.

## Description

`plot2d2` is the same as `plot2d` but the functions given by `(x,y)` are supposed to be piecewise constant.

By default, successive plots are superposed. To clear the previous plot, use `clf()`.

Enter the command `plot2d2()` to see a demo.

Note that all the modes proposed by `plot2dxx` (xx = 1 to 4) can be enabled using `plot2d` and setting the `polyline_style` option to the corresponding number.

## Examples

    // plots a step function of value i on the segment [i,i+1]
    // the last segment is not drawn
    plot2d2([1:4],[1:4],1,"111","step function",[0,0,5,5])

plot2d2([1:4],[1:4],1,"111","step function",[0,0,5,5])

    // compare the following with plot2d
    x=[0:0.1:2*%pi]';
    clf()
    plot2d2(x,[sin(x) sin(2*x) sin(3*x)])

x=[0:0.1:2*%pi]'; plot2d2(x,[sin(x) sin(2*x) sin(3*x)])

    x=[0:0.1:2*%pi]';
    clf();
    plot2d(x,[sin(x) sin(2*x) sin(3*x)])
    e=gce();
    e.children(1).polyline_style=2;
    e.children(2).polyline_style=2;
    e.children(3).polyline_style=2;

x=[0:0.1:2*%pi]'; plot2d(x,[sin(x) sin(2*x) sin(3*x)]) e=gce(); e.children(1).polyline_style=2; e.children(2).polyline_style=2; e.children(3).polyline_style=2;

## See also

- plot2d
- plot2d3
- plot2d4
- subplot
- clf
- polyline_properties