Retain current plot when adding new plots (2024)

FAQs

How to keep a plot in MATLAB? ›

Use hold on to add a second line plot without deleting the existing line plot. The new plot uses the next color and line style based on the ColorOrder and LineStyleOrder properties of the axes. Then reset the hold state to off.

hold on retains the current plot and certain axes properties so that subsequent graphing commands add to the existing graph. hold off resets axes properties to their defaults before drawing new plots. hold off is the default. hold toggles the hold state between adding to the graph and replacing the graph.

Alternatively, you can specify the legend labels using the DisplayName property. Set the DisplayName property as a name-value pair when calling the plotting functions. Then, call the legend command to create the legend.

legend associates strings with the objects in the Axes in the same order that they are listed in the Axes Children property. By default, the legend annotates the current Axes. MATLAB displays only one legend per Axes. legend positions the legend based on a variety of factors, such as what objects the legend obscures.

Update Plot Using Data Linking

Create the variable x to represent the iteration number and y to represent the approximation. Plot the initial values of x and y . Turn on data linking using linkdata on so that the plot updates when the variables change. Then, update x and y in a for loop.

Save Plots Interactively

For example, create a bar chart. Save the chart to a file by hovering over the export button in the axes toolbar and selecting the first item in the drop-down list. MATLAB displays the Save As dialog box with the file type options.

In short, hold on sets up the axes to add new objects to the axes while hold off sets up the axes to reset when new objects are added.

If you hold off doing something, you delay doing it or delay making a decision about it. The hospital staff held off taking Rosenbaum in for an X-ray. If you hold off a challenge in a race or competition, you do not allow someone to pass you.

Description. r = rem( a , b ) returns the remainder after division of a by b , where a is the dividend and b is the divisor. This function is often called the remainder operation, which can be expressed as r = a - b. *fix(a./b) .

Create a plot. Then create a title and a subtitle by calling the title function with two character vectors as arguments. Use the 'Color' name-value pair argument to customize the color for both lines of text. Specify two return arguments to store the text objects for the title and subtitle.

How do you plot without a legend in MATLAB? ›

One can suppress a legend entry for a line object h by executing h. HandleVisibility='off' or h. Annotation. LegendInformation.

plot( points , ax ) plots points in the specified axis. plot( points , ax ,Name=Value) specifies options using one or more name-value arguments in addition to any combination of arguments from previous syntaxes. For example, plot(ShowOrientation=true) renders the orientation in the display plot.

Accepted Answer

Legends are currently limited to no more than 50 entries. Usually in plots with more than 50 features, the plot is so cluttered and the legend is so large that it is more advisable to select just a few key items to display in the legend.

To add a legend title, set the String property of the legend text object. To change the title appearance, such as the font style or color, set legend text properties. For a list, see Text Properties. plot(rand(3)); lgd = legend('line 1','line 2','line 3'); lgd.

grid on displays the major grid lines for the current axes returned by the gca command. Major grid lines extend from each tick mark. grid off removes all grid lines from the current axes or chart. grid toggles the visibility of the major grid lines.

To save variables to a MATLAB script, click the Save Workspace button or select the Save As option, and in the Save As window, set the Save as type option to MATLAB Script. Variables that cannot be saved to a script are saved to a MAT-file with the same name as that of the script.

saveas( fig , filename ) saves the figure or Simulink^® block diagram specified by fig to file filename . Specify the file name as a character vector or string that includes a file extension, for example, 'myplot. jpg' .

To save a figure as an image at a specific resolution, call the exportgraphics function, and specify the 'Resolution' name-value pair argument. By default, images are saved at 150 dots per inch (DPI). For example, create a bar chart and get the current figure. Then save the figure as a 300-DPI PNG file.