在Matlab中，使用contour plot绘制等值线图是一种常见的方法。例如，可以绘制函数z = x * exp(-x^2 - y^2)的等值线图。首先，创建网格数据，这可以通过meshgrid函数实现：[x, y] = meshgrid(-2:.2:2, -1:.15:1);然后计算z值：z = x .* exp(-x.^2 - y.^2);接下来，使用gradie...
Then, label the contour plot. Get [x,y,z] = peaks; [C,h] = contour(x,y,z); clabel(C,h) Label Specific Contour Levels Copy Code Copy Command Label only the contours with contour levels 2 or 6. Get [x,y,z] = peaks; [C,h] = contour(x,y,z); v = [2,6]; c...
Adjust the display so that the gradient vectors appear perpendicular to the contour lines by calling axis equal. Get quiver(X,Y,DX,DY) hold on contour(X,Y,Z) axis equal hold off Specify Arrow Color Copy Code Copy Command Create a quiver plot and specify a color for the arrows. Get ...
Combine Contour Plot and Quiver PlotCopy Code Copy CommandDisplay contour lines and gradient vectors on the same plot.Plot 10 contours of xe−x2−y2 over a grid from -2 to 2 in the x and y directions. Get [X,Y] = meshgrid(-2:0.2:2); Z = X .* exp(-X.^2 - Y.^2);...
plot(x,y1,x,y2,'--',x,y3,':') % 分组绘制多折线图,并分别指定线型 plot(x,y,'-o','MarkerIndices',1:5:length(y)) % 设置线型,并设置显示的标记数量 plot(x,y,'-o','MarkerIndices',[1 5 10]) % 设置线型,并在第一、第五和第十个数据点处显示圆形标记 ...
1、contour 函数绘制等高线 2、代码示例 3、绘制彩色等高线并标注高度值 一、二维网格 1、线图 与 平面图 之前使用 plot 和 plot3 绘制的都是线图 , 给定若干个点的向量 , 绘制这些点 , 然后将这些点使用直线连接起来 , 组成了线图 ; 绘制3 维线图时 , 只需要给定 X,Y,Z 三个向量 ( 每个向量都含有 ...
The contourf function does not draw contour lines in those regions. Define matrix Z as a sampling of the peaks function. Replace all values in column 26 with NaN values. Then plot the contours of the modified Z matrix. Get Z = peaks; Z(:,26) = NaN; contourf(Z)...
Adjust the display so that the gradient vectors appear perpendicular to the contour lines by calling axis equal. Get quiver(X,Y,DX,DY) hold on contour(X,Y,Z) axis equal hold off Specify Arrow Color Copy Code Copy Command Create a quiver plot and specify a color for the arrows. Get ...
'on'— Display the vectors with arrowheads. 'off'— Display the vectors without arrowheads. Use the automatic scale factor to adjust arrow length, specified as'on'or'off', or as numeric or logical1(true) or0(false). A value of'on'is equivalent totrue, and'off'is equivalent tofalse. ...
such as as the bottom surface of a three-dimensional surface plot, or perform two-dimensional interpolation tasks. Its basic syntax is [X, Y] = meshgrid(x, y), where x and y are two vectors representing points on the X-axis and Y-axis respectively. The function returns two matrices X...