how to convert 3d scatter plot to 2d image matlab

Any image pixels that fall within the data range selected in the scatter plot are plotted in color in the Image window. Place the cursor anywhere inside the scatter plot and middle-click to plot a colored box on the scatter plot. To interactively view the distribution of image pixels, select Options > Scatter:Dance.To return to normal viewing, middle-click in the window. In the Scatter plot window, middle-click and drag the box outline that appears. To zoom to an area within the scatter plot, select Options > Scatter:Zoom.The Scatter Plot Band Choice dialog appears.Ĭhoose the x and y axes for the scatter plot by selecting the desired bands in the Choose Band X and Choose Band Y columns. Here are some basic instructions for using the dialog.įrom the Display group menu bar, select Tools > 2D Scatter Plots. You can also show the density distribution of the scatter plot.įor complete details on using the Scatter plot window, see the topic 'Using 2D Scatter Plots' in the ENVI Classic Help. Dancing pixels show how the distribution of pixels under a box changes as you move it interactively in both the scatter plot and image. You can select ROIs in the scatter plots and save them for use in other full band processing techniques.

Two-dimensional scatter plots use only the data in the Image window so quick interactive response is provided. If desired, you can have multiple scatter plots active simultaneously. Use 2D Scatter Plots to interactively classify two bands of image data. See Scatter Plots for the recommended method for using scatter plots in ENVI. % create 2D mesh grids.This topic describes how to use 2D scatter plots with an ENVI Classic display group. To plot this data in Matlab, you must interpolate the data on a uniform grid, as shown below. In the following example, notice that the Gaussian profile is not sampled uniformly in the Y direction. This is an important detail when plotting data obtained from a non-uniform mesh. This is not true of the image command in the Lumerical script environment. The standard image command in MATLAB assumes that matrix data is uniformly sampled, even when you provide the x,y position vectors. % transpose matrix, plot data, add color barĢD image plot with non-uniform, rectilinear data MATLAB commands to generate equivalent plot To get the same figure orientation in MATLAB as in your Lumerical plots, you must apply an unconjugated transpose operation and adjust the axes, as shown below.ĢD image plot with uniform, rectilinear data MATLAB uses a different convention for plotting 2D matrix data than Lumerical. This page shows how to create 2D image plots of data from Lumerical's software using MATLAB.

How to convert 3d scatter plot to 2d image matlab