## How do you zoom in on an octave plot?

With no arguments, toggle the current zoom mode on or off. Given the option “xon” or “yon” , enable zoom mode for the x or y-axis only. Given the option “out” , zoom to the initial zoom setting. Given the option “reset” , store the current zoom setting so that zoom out will return to this zoom level.

**How do you plot 3D functions in octave?**

After having made a grid you can plot a 3D graph using the command mesh(xx,yy,z) , where xx and yy are the matrices made by meshgrid and where z is a function of x and y . You get the function values of z by using element by element operations on matrices xx and yy .

### What does Meshgrid do in octave?

meshgrid is most frequently used to produce input for a 2-D or 3-D function that will be plotted. The following example creates a surface plot of the “sombrero” function. f = @(x,y) sin (sqrt (x. ^2 + y.

**How do you plot surfaces in octave?**

Notes

- linspace (start, end, n) linspace returns a row vector with n linearly spaced elements between the start and end. parameters.
- meshgrid(x,y) meshgrid returns the 2D grid matrices for the passed x and y vectors.
- surf. surface mesh is plotted with the output of the meshgrid 2D matrices.

## How do you zoom in octave?

**How do I zoom out on a Matplotlib plot?**

If you press ‘x’ or ‘y’ while panning the motion will be constrained to the x or y axis, respectively. Press the right mouse button to zoom, dragging it to a new position. The x axis will be zoomed in proportionate to the rightward movement and zoomed out proportionate to the leftward movement.

### How do you hold on in Octave?

Toggle or set the “hold” state of the plotting engine which determines whether new graphic objects are added to the plot or replace the existing objects. Retain plot data and settings so that subsequent plot commands are displayed on a single graph. Line color and line style are advanced for each new plot added.

**What is the difference between Octave and Matlab?**

MATLAB is a matrix laboratory, referred to as language used for technical computations. Octave is programming language used for numerical computations.

## How do you declare a function in octave?

Defining Functions. A valid function name is like a valid variable name: a sequence of letters, digits and underscores, not starting with a digit. Functions share the same pool of names as variables. The function body consists of Octave statements.

**What is Linspace in octave?**

: linspace ( base , limit ) : linspace ( base , limit , n ) Return a row vector with n linearly spaced elements between base and limit . If the number of elements is greater than one, then the endpoints base and limit are always included in the range.

### How do you make a scatter plot in octave?

If the first argument hax is an axes handle, then plot into this axis, rather than the current axes returned by gca . The optional return value h is a graphics handle to the created scatter object. Example: x = randn (100, 1); y = randn (100, 1); scatter (x, y, [], sqrt (x.

**How do you plot a 3D surface?**

Basic steps

- Establish the domain by creating vectors for x and y (using linspace, etc.)
- Create a “grid” in the xy-plane for the domain using the command meshgrid.
- Calculate z for the surface, using component-wise computations.
- Plot the surface. The main commands are mesh(x,y,z) and surf(z,y,z)

## How to plot a three dimensional plot in octave?

The vertices of the rectangles [ x, y] are typically the output of meshgrid . over a 2-D rectangular region in the x-y plane. z determines the height above the plane of each vertex. If only a single z matrix is given, then it is plotted over the meshgrid x = 1:columns (z), y = 1:rows (z) .

**How to plot the height of a rectangle in octave?**

The vertices of the rectangles [ x, y] are typically the output of meshgrid . over a 2-D rectangular region in the x-y plane. z determines the height above the plane of each vertex. If only a single z matrix is given, then it is plotted over the meshgrid x = 0:columns (z) – 1, y = 0:rows (z) – 1 .

### How does the legend plot work in octave?

If the first argument hax is an axes handle, then plot into this axis, rather than the current axes returned by gca. If the handles, hobjs, are not specified then the legend’s strings will be associated with the axes’ descendants. legend works on line graphs, bar graphs, etc.

**How does the GCA plot work in octave?**

Any property/value pairs are passed directly to the underlying surface object. If the first argument hax is an axes handle, then plot into this axis, rather than the current axes returned by gca . The optional return value h is a graphics handle to the created surface object.