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How to plot in Scilab

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Plotting in Scilab is fairly simple when you know the commands and syntax.

CommandsEdit

Command for plotting

  • plot()

Usage:

  • plot(x,y,<LineSpec>,<GlobalProperty>)

Simple PlottingEdit

Plotting a sin waveEdit

plot

Plotting two images on top of each otherEdit

Code Plot
clf()
t=0:0.1:2*%pi;
y1=sin(t);
y2=sin(2*t);
y=[y1;y2];
plot(t,y)

or

plot(t,y1)
plot(t,y2)
Scilab-example-2

Making multiply plots in the same windowEdit

To make more than one plot in the same window you use the

  • command
    • subplot
  • Usage
    • subplot(<columns><rows><plot location>)

Example of 4 plots in the same window

Code Plot
clf()
t=0:0.1:2*%pi;
y1=sin(t);
y2=sin(2*t);
y3=sin(4*t);
y4=sin(8*t);
subplot(221);
plot(t,y1)
subplot(222)
plot(t,y2)
subplot(223)
plot(t,y3)
subplot(224)
plot(t,y4)
Scilab-example-3


LabelingEdit

  • Command
    • xtitle()
  • Usage
    • xtitle("<title>","<x-axis>","<y-axis>")
Code Plot
clf()
t=0:0.1:2*%pi;
y=sin(t);
xtitle("this is the title","the x-axis","the y-axis")
plot(t,y)
Scilab-example-4-title

Line AppearanceEdit

Different Line styles, and colors


Code Plot
clf()
t=0:0.1:2*%pi;
y=sin(t);
plot(t,y,"o")
Scilab-example-5-line-style

Line StyleEdit

Specifier Line Style

-

Solid line (default)

--

Dashed line

:

Dotted line

-.

Dash-dotted line

+

Plus sign

o

Circle

*

Asterisk

.

Point

x

Cross

'square' or 's'

Square

'diamond' or 'd'

Diamond

^

Upward-pointing triangle

v

Downward-pointing triangle

>

Right-pointing triangle

<

Left-pointing triangle

'pentagram'

Five-pointed star (pentagram)

Line ColorEdit

As an additional parameter, supply the SpecifierColor which can be:

r - Red g - Green b - Blue c - Cyan m - Magenta y - Yellow k - Black w - White

Multiply WindowsEdit

ReferencesEdit

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