Graph Plots in Matlab

Graph Plots in Matlab

• 1.
  Matlab: Graph Plots
• 2.
  Tools for plottingplot-plot(y) plots the values in vector y versus their index.  plot(x,y) plots the values in vector y versus x. The plot function produces a piecewise linear graph between its data values. With enough data points it looks continuous.stem- Using stem(y) the data sequence y is plotted as stems from the x-axis terminated with circles for the data values. stem(x,y) plots the data sequence y at the values specified in x.
• 3.
  Tools for plottingxlabel('string') - Labels the x-axis with string.ylabel('string') - Labels the y-axis with string.title('string') - Gives the plot the title string.
• 4.
  Tools for plottingholdon / off - Normally hold is off. This means that the plot command replaces the current plot with the new one. To add a new plot to an existing graph use hold on. If you want to overwrite the current plot again, use hold off.legend('plot1','plot2',...,'plot N') - The legend command provides an easy way to identify individual plots when there are more than one per figure.axis([xminxmaxyminymax])- Use the axis command to set the axis as you wish.
• 5.
  Tools for plottingsubplot(m,n,p) -Dividesthe figure window into m rows, n columns and selects the pp'th subplot as the current plot, e.g subplot(2,1,1) divides the figure in two and selects the upper part. subplot(2,1,2) selects the lower part.grid on/off - This command adds or removes a rectangular grid to your plot.
• 6.
  Graph ComponentsThe followingpicture shows the basic components of a typical graph.
• 7.
  2-D plottingTo plotthe function:y = x2 for x 2 [-2; 2].x = -2:0.2:2;
• 8.
  y = x.^2;
• 9.
  figure(1);
• 10.
  plot(x,y);
• 11.
  xlabel('x');