![]() ![]() Again, it's the value (height) or the amount of power in those frequencies that is the crucial thing, not the slope. Now the author may be thinking of MTF curves where the slope at mid-level frequencies may (or may not) get steeper as the blurring gets worse. For example, if you have a periodic texture in the spatial domain, you would have steep slopes in some places in the spectral domain because the periodic structure in the spatial domain will give periodic spikes in the spectral domain. What's more important is the values out in the higher frequencies of the spectral domain. It's not right to say that flat or steep slopes in the spectral domain necessarily mean anything. The slope does get flatter in the spatial domain, like when sharp steep edges get blurred out. The first clause of the hint talks about the power spectrum, but what it says after that applies to the SPATIAL domain, not the spectral domain. in optics and 37 years of developing imaging algorithms I hope I know at least 0.001% of the imaging concepts out there and a pretty darn good intuitive feel for fourier domain concepts. Plot(x,y), xlabel('x'),ylabel('exp(–1.I'm not sure who wrote your hint, but it's misleading. Following example demonstrates the concept − Example Where, m and n are the number of rows and columns of the plot array and p specifies where to put a particular plot.Įach plot created with the subplot command can have its own characteristics. The subplot command is used for creating subplots. When you create an array of plots in the same figure, each of these plots is called a subplot. When you run the file, MATLAB generates the following graph − Generating Sub-Plots The following example shows this − Example You can provide minimum and maximum values for x and y axes using the axis command in the following way − ![]() ![]() The axis command allows you to set the axis scales. When you run the file, MATLAB generates the following graph − Setting Axis Scales The following table shows the colors and their codes − Code MATLAB provides eight basic color options for drawing graphs. MATLAB generates the following graph − Setting Colors on Graph The following example demonstrates the concept − Example You can draw multiple graphs on the same plot. MATLAB generates the following graph − Drawing Multiple Functions on the Same Graph The axis square command generates a square plot. The axis equal command allows generating the plot with the same scale factors and the spaces on both axes. The grid on command allows you to put the grid lines on the graph. The title command allows you to put a title on the graph. The xlabel and ylabel commands generate labels along x-axis and y-axis. MATLAB allows you to add title, labels along the x-axis and y-axis, grid lines and also to adjust the axes to spruce up the graph. MATLAB draws a smoother graph − Adding Title, Labels, Grid Lines and Scaling on the Graph Please note that as we decrease the increment, the graph becomes smoother.Ĭhange the code file a little, reduce the increment to 5 − In this example, we will draw two graphs with the same function, but in second time, we will reduce the value of increment. Let us take one more example to plot the function y = x 2. When you run the file, MATLAB displays the following plot − ![]() Let us plot the simple function y = x for the range of values for x from 0 to 100, with an increment of 5.Ĭreate a script file and type the following code − To plot the graph of a function, you need to take the following steps −ĭefine x, by specifying the range of values for the variable x, for which the function is to be plottedįollowing example would demonstrate the concept. ![]()
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