Scilab surf how to#
Scilab surf Patch#

1) I would guess that this would usually not make people happy, since it is difficult to visualize the shape. Theme Copy h surf (peaks (50)) set (h,'edgecolor','none','facecolor'. cdata_mapping = ' direct ' // default is ' scaled ' relative to the colormap e. surf (peaks (20)) colormap summer shading interp Or, you can just set the color to be a boring, flat, greenish hue. LineSpec and GlobalProperty examples: Z = close ( winsid ( ) ) // destroy all existing figures surf ( Z, Z + 5 ) // colors array specified e = gce ( ) e. example 3 // X and Y are vectors = > same behavior as sample 1 // With vectors, the grid is inevitably rectangular X = Y = X Z = surf ( X, Y, Z ) X and Y initialisation // NB: here, X has the same lines and Y the same columns X = Y = Z = scf ( 3 ) surf ( X, Y, Z ) Note that all these properties can be (re-)set through the surfaceĮntity properties (see surface_properties). That you can set multiple properties : the face & edge color,Ĭolor data, color data mapping, marker color (foreground andīackground), the visibility, clipping and thickness of the edges of PropertyValue (which can be a string or an integer or.Īs well depending on the type of the PropertyName). It must always be a couple statement constituted of a stringĭefining the PropertyName, and its associated value

This option may be used to specify how all the surfaces areĭrawn. Here is a brief description on how it works: GlobalProperty The GlobalProperty arguments should be used to customize Vertices), the last row and column of C are ignored. When 'flat' (default mode) is enabled we use a colorįaceted representation (one color per patch).

Scilab surf Patch#

The color of the vertices defining the patch is set to the given color of we provided only one color per patch) then 'interp' is selected, we perform a bilinear color The FaceColor property sets the shading mode : it canīe 'interp' or 'flat' (default mode). (one color defined per vertex) orĬolor representation also varies when specifying some GlobalPropery: Matrix, the C colors matrix dimension can be The vertices or at the center of each patch. Matrix is given, it can be applied to the patch in two different ways : at mode<0: the surface is painted with color '-mode' the boundary of the facet is not drawn. Matrices matching the Z matrix dimension (and the grid isĬonsidering the 3 functions x(i,j), y(i,j)Īnd z(i,j), the portion of surface defining between twoīy default, when no colors matrix is added to a surf call, the colors mode>0 the surface is painted with color 'mode' the boundary of the facet is drawn with current line style and color. Y are vectors, they are internally treated to produce good (even if X or Y is vector, see below) and can beĬonsidered as 3 functions x(i,j), y(i,j) and

This imaginary rectangular grid is used to build the real surface I understand the real is sigma and the imaginary is omega, but then why does it add I may need to use the.

Scilab surf how to#

mkfftfilter Create frequency domain filter 3. X,Y meshgrid (sig, omeg) Not quite sure how to create a vector for parts of the complex variable, a grid for s, or how to determine the magnitude of the function since it asks you to plot the real and imaginary components. The default axes used is the active gca() one. imsurf Visualize 2D matrix using surf plot, useful for frequency response visualization. Handle of the graphical axes where the surface must be drawn. For a complete view of the available properties (see Global objects' properties applied to all the curves created by this (X(j),Y(i)) point of the grid (see description Surf(…) automatically generates matrices fromĪn optional real matrix defining a colors value for each Vectors while fun(…) expects only input matrices, Through a list, as in surf(x,y, list(delip, -0.4)) or If the 2D function fun to plot needs some parametersĪs input arguments, the function and its parameters can be specified Handle of a function, as in surf(x,y, myFun) where theĮxpected syntax of myFun is Z=myFun(X,Y). They define the data grid (horizontal coordinates of the grid nodes).Īll grid cells are quadrangular but not necessarily rectangular.Ī real matrix explicitly defining the heights of nodes, of sizes H.Two vectors of real numbers, of lengths nx and ny H.cdata_mapping='direct' //change color mapping from 'scaled' to 'direct' H.lor=((cm-Zmin)./(Zmax-Zmin)).*(nc-1)+1 //scale color matrix & convert to color number Zmax=max(max(z1),max(z2)) //Absolut maximum of all data sets Zmin=min(min(z1),min(z2)) //Absolut minimum of all data sets And as a surface it has the cdata_mapping property, which can be changed from scaled to direct and scale the color matrix (which defines the color of each facet) according to the actual range used: x=-5:0.1:5 Please note, that surf generates a 3D plot, but you can rotate it to seem as a 2D plot. I don't know how to do it with contourf, but if you can use surf instead, I have a suggestion.