plotxy

Plot two series against each other

Syntax

fh = plotxy(x,y)

fh = plotxy(x,y,Name,Value)

Description

fh = plotxy(x,y) plots values of the simulation series y along the y-axis, with values of the simulation series x along the x-axis. fh is a cell array of handles to the resulting figures. x and yare simscape.logging.Series objects or homogeneous cell arrays of such objects. All series must have the same time vectors. If x and y are cell arrays, they must be of the same size, or one of them can be a scalar.

fh = plotxy(x,y,Name,Value) lets you customize the plot by using one or more Name,Value pair arguments. For example, specify 'time' followed by a 1x2 vector, [start_time end_time], to plot only the data within this time range.

Examples

Plot Motor Torque Series Against Its Angular Velocity Series

Plot the motor torque series against its angular velocity series.

Open the Permanent Magnet DC Motor example model:

ssc_dcmotor

This example model has data logging enabled for the whole model, with the Workspace variable name parameter set to simlog_ssc_dcmotor.

Simulate the model to log the simulation data:

sim('ssc_dcmotor');

Plot the motor torque against its angular velocity:

simscape.logging.plotxy(simlog_ssc_dcmotor.DC_Motor.Rotational_Electromechanical_Converter.R.w.series,...
   simlog_ssc_dcmotor.DC_Motor.Inertia.t.series)

Add Axis Names to the Plot

When you plot the series against each other, the default plot displays only the unit names along each axis. To add the axis names, use name-value pair arguments.

simscape.logging.plotxy(simlog_ssc_dcmotor.DC_Motor.Rotational_Electromechanical_Converter.R.w.series,...
   simlog_ssc_dcmotor.DC_Motor.Inertia.t.series,'xname','Angular velocity','yname','Torque')

Input Arguments

x — Simulation data to plot along x-axis

scalar Series object | nonscalar Series object | cell array of Series objects

Simulation data to plot along the x-axis, specified as a simscape.logging.Series object or a homogeneous cell array of such objects. x must include a full identifier path to the series, starting with the workspace log variable name. If x and y are cell arrays, they must be of the same size, or one of them can be a scalar. All series must have the same time vectors.

y — Simulation data to plot along y-axis

scalar Series object | nonscalar Series object | cell array of Series objects

Simulation data to plot along the y-axis, specified as a simscape.logging.Series object or a homogeneous cell array of such objects. y must include a full identifier path to the series, starting with the workspace log variable name. If x and y are cell arrays, they must be of the same size, or one of them can be a scalar. All series must have the same time vectors.

Name-Value Pair Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Example: fh = plotxy(simlog.TS.C.v.series,simlog.TS.R.v.series,'xunit','mm/s','yunit','mm/s') plots velocities of ports C and R of the Translational Spring block TS against each other, in mm/s.

'time' — Time range for plotting data

[ ] (default) | 1x2 vector, [start_time end_time] in seconds

Time range for plotting the data, specified as the comma-separated pair consisting of 'time' and a 1x2 vector, [start_time end_time], in seconds.

[] plots all data.

'xname' — Name of x-axis

character vector | string scalar | cell array of character vectors or string scalars

Name of the plot x-axis, specified as the comma-separated pair consisting of 'xname' and a character vector, string scalar, or a cell array of character vectors or string scalars. The number of elements in the cell array must be same as the number of elements of x.

'yname' — Name of y-axis

character vector | string scalar | cell array of character vectors or string scalars

Name of the plot y-axis, specified as the comma-separated pair consisting of 'yname' and a character vector, string scalar, or a cell array of character vectors or string scalars. The number of elements in the cell array must be same as the number of elements of y.

'xunit' — Unit for plotting data along x-axis

character vector | string scalar

Unit for plotting the data along the x-axis, specified as the comma-separated pair consisting of 'xunit' and a unit name, or a cell array of unit names. Unit names must appear inside single quotes ('') or double quotes (""). Specified units must be commensurate with the units of the series values.

'yunit' — Unit for plotting data along y-axis

character vector | string scalar

Unit for plotting the data along the y-axis, specified as the comma-separated pair consisting of 'xunit' and a unit name, or a cell array of unit names. Unit names must appear inside single quotes ('') or double quotes (""). Specified units must be commensurate with the units of the series values.

Output Arguments

fh — Handles to the resulting plot figure windows

cell array

Handles to the resulting plot figure windows, one for each y versus x plot generated, returned as a cell array.