How do you get the values from a graph in Matlab?

You can get the data from a plot by accessing the XData and YData properties from each Line object in the axes.

  1. Make the figure containing the plot the current figure.
  2. Call the gca command to get the current axes within that figure.
  3. Get the coordinates from the XData and YData properties of the Line object.

How do you plot a line plot in Matlab?

Create a 2-D line plot and specify the line style, line color, and marker type. Add markers to a line plot to distinguish multiple lines or to highlight particular data points. Create a plot with confidence bounds using the fill function to draw the confidence bounds and the plot function to draw the data points.

How do I plot a marker in Matlab?

Add markers in one of these ways:

  1. Include a marker symbol in the line-specification input argument, such as plot(x,y,’-s’) .
  2. Specify the Marker property as a name-value pair, such as plot(x,y,’Marker’,’s’) .

How do you make a dotted line in Matlab?

Create a plot with a red dashed line and circular markers by specifying the linespec argument as ‘–or’ . For this combination, ‘–‘ corresponds to a dashed line, ‘o’ corresponds to circular markers, and ‘r’ corresponds to red.

How do I extract data from a plot?

Extracting data from graph image

  1. Step 1: Upload the image to PlotDigitizer. Go to PlotDigitizer’s free online app, and upload the image by clicking or drag-dropping.
  2. Step 2: Select the graph type.
  3. Step 3: Calibrating the axes.
  4. Step 4: Extracting data points from the plot.
  5. Step 5: Exporting the extracted data.

How do you find the value of a function at a point in MATLAB?

I have to write Matlab function:function value = evaluate(f,x,y,n) that evaluates value of real function f on equidistant array of n points on segment [x,y]. Function has to return vector of dimension 2xn, such that in first row are points from equidistant array, and in second row is function value in those points.

What is the line function in Matlab?

line( x , y ) plots a line in the current axes using the data in vectors x and y . If either x or y , or both are matrices, then line draws multiple lines. Unlike the plot function, line adds the line to the current axes without deleting other graphics objects or resetting axes properties.

How do you plot a vertical line in Matlab?

xline( x ) creates a vertical line at one or more x-coordinates in the current axes. For example, xline(2) creates a line at x=2 . xline( x , LineSpec ) specifies the line style, the line color, or both.

How do you plot points?

Follow these simple steps:

  1. First, find the value for x on the x-axis.
  2. Next, find the y-value – in this case, y=1100, so find 1100 on the y-axis.
  3. Your point should be plotted at the intersection of x=0 and y=1100.
  4. Finally, plot the point on your graph at the appropriate spot.

How do I show data points in Matplotlib?

Showing points coordinates in a plot in Python using Matplotlib

  1. Set the figure size and adjust the padding between and around the subplots.
  2. Create lists of x and y data points.
  3. Plot x and y data points with red color and starred marker.
  4. Set some axis properties.
  5. Iterate x and y to show the coordinates on the plot.

How do you make a vertical line in MATLAB?

How to display the value of output on plot in MATLAB?

Is their any way that MATLAB displays the value of output on plot? Like thethe R^2 In the given imagee. Sign in to answer this question. Read about text. With this function, you can specify the string str by providing location (x,y). At this position (x,y) you can display a string str. You can use text () or you can use annotate () .

How do you plot a line plot in MATLAB?

Create a line plot of both sets of data. Define Y as the 4-by-4 matrix returned by the magic function. Create a 2-D line plot of Y. MATLAB® plots each matrix column as a separate line. Plot three sine curves with a small phase shift between each line. Use the default line style for the first line.

How do I add markers to a MATLAB plot?

View MATLAB Command Create a line plot with 1,000 data points, add asterisks markers, and control the marker positions using the MarkerIndices property. Set the property to the indices of the data points where you want to display markers. Display a marker every tenth data point, starting with the first data point.

How do you plot sine curves in MATLAB?

Use the default line style for the first line. Specify a dashed line style for the second line and a dotted line style for the third line. MATLAB® cycles the line color through the default color order. Plot three sine curves with a small phase shift between each line. Use a green line with no markers for the first sine curve.