First we give the points in which the function values should be counted. Other problem is the command plotyy. Right-click the axis on which you want to create multiple scales and select Duplicate Scale. By default the arguments are evaluated with feval (@plot, x, y). Using Octave for plotting graphs Gunnar Abstract Lecture notes on using Octave for plotting graphs Plotting graphs Suppose You wish to plot the graph of sin(x) in some interval. A plot must exist before legend is called. Place the chart or graph indicator on the front panel. : bar (y): bar (x, y): bar (â¦, w): bar (â¦, style): bar (â¦, prop, val, â¦): bar (hax, â¦): h = bar (â¦, prop, val, â¦) Produce a bar graph from two vectors of X-Y data. There are two low-level functions, gplot and gsplot, that behave almost exactly like the corresponding gnuplot functions plot and `splot'.A number of other higher level plotting functions, patterned after the graphics functions found in MATLAB version 3.5, are also available. The above plot is of 10×10 grid, each grid represents a value with a color. Please follow the steps below. From Command 85, we see that plot can plot many graphs in a single call, and that you can even specify the properties and values of each graph. For example command plot with hold on you can draw a new figure over the previous figure. We can also make a color bar with this plot to see which value corresponds to which color using the colorbar command. octave-3.0.1:2> t=linspace(0,10,21); octave-3.0.1:3> plot (t, 2. plot with the new, which is not what we want. If only one argument is given, y, it is taken as a vector of Y values and the X coordinates are the range 1:numel (y). Plotting. The arguments x1 and y1 define the arguments for the first plot and x1 and y2 for the second. 2. The optional input w controls the width of the bars. The same color value results in the same color. It turns out that adding this dummy plot still causes the left axis to change. If the handles, hobjs, are not specified then the legendâs strings will be associated with the axesâ descendants. We can use multiple commands at a time by separating them with a comma(,) in Octave environment. *t, t, t.*t) Henry on 5/13/08 3:35 PM, george brida at [hidden email] wrote: > Dear friends, > if I have two functions of variable t, how to represent them in the same > plot? It is possible to plot data using different scales by using multiple axes on the same graph. I think this option is not possible with plotyy. legend works on line graphs, bar graphs, etc. However the type of plot can be modified with the fun argument, in which case the plots are generated by feval (fun, x, y). If the first argument hax is an axes handle, then plot into this axis, rather than the current axes returned by gca. To overlap the two plot, type octave#:#> hold on; This will allow you to plot multiple graphs within the same ï¬gure. I think but I'm not sure that, it is impossible with this command to do multiple plot in the same figure. That is, ⦠From now on, any new graph will be plotted on the same ï¬gure (to return to the default mode of one plot per ï¬gure, type hold off at the end of this example). Alternatively, you can use the command hold on to force Octave to not delete the existing graph(s); that is, instead of Command 85, you can use: Plot two sets of data with independent y-axes and a common x-axis. Here we use hold on to prevent the current data from being deleted, then plot the new data with plotyy that also adds a dummy plot to the left axis (a single point 0,0). All of Octave's plotting functions use gnuplot to handle the actual graphics. 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