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Please note that the recommended version of Scilab is 2024.1.0. This page might be outdated.

See the recommended documentation of this function

# Matplot

2D plot of a matrix using colors

### Calling Sequence

Matplot(a,[strf,rect,nax]) Matplot(a,<opt_args>)

### Arguments

- a
real matrix of size (n1,n2).

- <opt_args>
This represents a sequence of statements

`key1=value1, key2=value2`

,... where`key1`

,`key2,...`

can be one of the following:- rect
sets the bounds of the plot. If this key is given and neither

`frameflag`

nor`strf`

is given then the`y`

character of`strf`

is supposed to be`7`

. See below for value.- nax
sets the grids definition. If this key is given and neither

`axesflag`

nor`strf`

is given then the`z`

character of`strf`

is supposed to be`1`

. See below for value.- frameflag
specifies how the frame of the plot is computed. The value is an integer ranging from 0 to 8. It corresponds to the

`y`

character of`strf`

. See below.- axesflag
specifies what kind of axes are drawn around the plot. The value is an integer ranging from 0 to 5. It corresponds to the

`z`

character of`strf`

. See below.

- strf
is a string of length 3

`"xyz"`

.- default
The default is

`"081"`

.- x
controls the display of captions.

- x=0
no caption.

- x=1
captions are displayed. They are given by the optional argument

`leg`

.

- y
controls the computation of the actual coordinate ranges from the minimal requested values. Actual ranges can be larger than minimal requirements.

- y=0
no computation, the plot use the previus (or default) scale

- y=1
from the rect arg

- y=2
from the min/max of the x, y datas

- y=3
built for an isometric scale from the rect arg

- y=4
built for an isometric plot from the min/max of the x, y datas

- y=5
enlarged for pretty axes from the rect arg

- y=6
enlarged for pretty axes from the min/max of the x, y datas

- y=7
like y=1 but the previus plot(s) are redrawn to use the new scale

- y=8
like y=2 but the previus plot(s) are redrawn to use the new scale

- z
controls the display of information on the frame around the plot. If axes are requested, the number of tics can be specified by the

`nax`

optional argument.- z=0
nothing is drawn around the plot.

- z=1
axes are drawn, the y=axis is displayed on the left.

- z=2
the plot is surrounded by a box without tics.

- z=3
axes are drawn, the y=axis is displayed on the right.

- z=4
axes are drawn centred in the middle of the frame box, with the box disabled.

- z=5
axes are drawn centred in the middle of the frame box, with the box enabled.

- rect
This argument is used when the second character y of argument

`strf`

is 1, 3 or 5. It is a row vector of size 4 and gives the dimension of the frame:`rect=[xmin,ymin,xmax,ymax]`

.- nax
This argument is used when the third character z of argument

`strf`

is 1. It is a row vector with four entries`[nx,Nx,ny,Ny]`

where`nx`

(`ny`

) is the number of subgraduations on the x (y) axis and`Nx`

(`Ny`

) is the number of graduations on the x (y) axis.

### Description

The entries of matrix `int(a)`

are used as colormap entries
in the current colormap.
The color associated to `a(i,j)`

is
used do draw a small square of size 1 with center at location
`(x=j,y=(n1-i+1))`

.
If a matrix entry is outside the colormap, the corresponding rectangle is not displayed.

Enter the command `Matplot()`

to see a demo.

### See Also

- colormap — using colormaps
- plot2d — 2D plot
- Matplot1 — 2D plot of a matrix using colors
- Matplot_properties — description of the Matplot entities properties

### Authors

J.Ph.C.

<< LineSpec | 2d_plot | Matplot1 >> |