scatterplot

Generate scatter plot

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Syntax

scatterplot(x)
scatterplot(x,n)
scatterplot(x,n,offset)
scatterplot(x,n,offset,plotstring)
scatterplot(x,n,offset,plotstring,h)
h = scatterplot(___)

Description

example

scatterplot(x) creates a scatter plot for signal x.

scatterplot(x,n) specifies decimation factor n. The function plot every nth value of x, starting from its first value.

scatterplot(x,n,offset) specifies the offset value. The function plots every nth value of x, starting from its (offset + 1)th value.

scatterplot(x,n,offset,plotstring) specifies plot attributes for the scatter plot.

scatterplot(x,n,offset,plotstring,h) generates the scatter plot in an existing figure whose handle is h. To plot multiple signals in the same figure, use hold on.

h = scatterplot(___) returns the handle to the figure that contains the scatter plot. You can specify any of the input argument combinations from the previous syntaxes.

Examples

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Open Live Script

Create a 64-QAM signal in which each constellation point is used.

d = (0:63)';
s = qammod(d,64);

Display the scatter plot of the constellation.

scatterplot(s)

Input Arguments

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Input signal, specified as a numeric vector or numeric matrix.

The interpretation of x depends on its shape and complexity.

  • If x is a real-valued two-column matrix, the function interprets the first column as in-phase components and the second column as quadrature components.

  • If x is a complex-valued vector, the function interprets the real part as in-phase components and the imaginary part as quadrature components.

  • If x is a real-valued vector, the function interprets it as a real signal.

Data Types: double
Complex Number Support: Yes

Decimation factor, specified as a positive integer. The function plots every nth value of input signal x, starting from its first value.

Data Types: double

Offset value, specified as a nonnegative integer. This offset value specifies the number of samples at the beginning of input x that the function skips before generating the scatter plot.

Data Types: double

Plot attributes, specified as a character vector or string scalar containing symbols.

This argument sets the plotting symbol, line type, and color for the scatter plot. The format and meaning of the symbols are the same as in the plot function. For example, the default value 'b.' produces blue dots.

Data Types: char | string

Figure handle to an existing figure that contains an scatter plot, specified as a Figure object. h must be a handle to a figure that scatterplot function previously generated.

Output Arguments

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Figure handle, returned as a Figure object. To modify properties of this object, see Figure Properties

See Also

Functions

Objects

Topics

Introduced before R2006a

Communications Toolbox Documentation
Support