Advanced Plotting and Model Building - FET

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Visualizing vector fields The function quiver draws little arrows to indicate a gradient or other vector field. Although it produces a 2-D plot, it’s often used in conjunction with contour. As an example, consider the scalar function of two variables V = x 2 + y. The gradient of V is defined as the vector field ∇V = ( ∂V / ∂x , ∂V / ∂y ) = (2x, 1). The following statements draw arrows indicating the direction of ∇V at points in the x-y plane (see the next figure). [x y] = meshgrid(-2:.2:2, -2:.2:2); V = x.^2 + y; dx = 2*x; dy = dx; % dy same size as dx dy(:,:) = 1; % now dy is same size as dx but all 1’s contour(x, y, V), hold on quiver(x, y, dx, dy), hold off 5-68 Z.R.K
Gradients <strong>and</strong> level surfaces Z.R.K
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UNIVERSITY OF JORDAN Faculty of Eng
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The following MATLAB session plots
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The plot will appear in the Figure
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Requirements for a Correct Plot The
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Requirements for a Correct Plot (co
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The effects of the axis and grid co
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The fplot command plots a function
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Plotting Polynomials with the polyv
Page 17 and 18: Saving Figures To save a figure tha
Page 19 and 20: On Windows systems, you can also co
Page 21 and 22: 5-21 The following script file crea
Page 23 and 24: Data Markers and Line Types To plot
Page 25 and 26: Specifiers for data markers, line t
Page 27 and 28: Labeling Curves and Data legend The
Page 29 and 30: The gtext and text commands are als
Page 31 and 32: Plot of the load line and the devic
Page 33 and 34: Why use log scales? Rectilinear sca
Page 35 and 36: Logarithmic Plots It is important t
Page 37 and 38: Logarithmic Plots (continued) 5. Eq
Page 39 and 40: Two data sets plotted on four types
Page 41 and 42: Frequency-response plot of a low-pa
Page 43 and 44: Specialized plot commands. Table 5.
Page 45 and 46: x = [0:pi/50:2*pi]; >> polar(x, sin
Page 47 and 48: x = [-2*pi:pi/20:2*pi]; >> x = x +
Page 49 and 50: Interactive Plotting in MATLAB This
Page 51 and 52: The Figure window with the Figure t
Page 53 and 54: The Plot Tools interface includes t
Page 55 and 56: The polyfit function is based on th
Page 57 and 58: The curve x = e -0.05t sin t, y = e
Page 59 and 60: A plot of the surface z = xe -[(x-y
Page 61 and 62: A contour plot of the surface z = x
Page 63 and 64: Plots of the surface z = xe -(x2 +y
Page 65 and 66: 5-65 Famous Mexican Z.R.K hat.
Page 67: 5-67 Famous Mexican hat, with meshg
Page 71 and 72: 5-71 Z.R.K
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Advanced Plotting and Model Building - FET

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