Scilab 6.1.0
Scilab Help >> Graphics > axes_operations > isoview
isoview
tunes isometric rendering of graphical axes
Syntax
isoview isoview on isoview off isoview(idGraphics) isoview(idGraphics,"on""off")
Arguments
 "on"  "off"  <none>
 Enables or disables or switches the isometric rendering for all considered axes.
 idGraphics
 Vector of graphic handles. All the related axes are processed. By default, the current axes is processed.
Description
isoview
is used to set or relax isometric rendering scales
on the x, y (and z) axes, without changing the size of the graphic window.
isoview()
or simply isoview
toggles the isoview status of the current axes, and keeps its current
bounds: isometric scales are set whenever
they were free, or scales are relaxed whenever they were isometric.
isoview("on")
or isoview on
sets isometric scales for the current axes.
isoview("off")
or isoview off
relaxes x, y (and z) scales for the current axes.
isoview(idGraphics,..)
runs on axes related
to each graphic object listed in the vector idGraphics
:
 If
idGraphics(i)
is a figure's handle, all its Axes are considered.  If
idGraphics(i)
is an Axes, it is considered as is.  If
idGraphics(i)
is the handle of a subaxes component (such as a polyline, a compound, etc), its hosting axes is considered.
The current axes graphical entity is still the same after calling isoview(..) . 
To plot some curves directly in isometric mode without calling
isoview afterwards, the plot2d(...,frameflag=4)
option may be used at call time. 
Rendering according to .isoview and .cube_scaling settings
isoview(..)  gca().isoview  gca().cube_scaling  Rendering 

on  on  off  X, Y and Z are isometric 
off  off  on  independent X, Y and Z scales. In 3D, improved aspect ratios when X/Y/Z ranges are very different. 
off  off  Independent X, Y, Z scales. In 3D, rendered X/Y/Z scales ratios are close to the data ones  
on  on  Scales are such that the axes looks square or cubic 
Examples
t = [0:0.1:2*%pi]'; clf nc = 3; subplot(2,nc,1) plot2d(cos(t),sin(t)) xtitle("True circle") a1 = gca(); subplot(2,nc,nc+1) plot2d(cos(t),sin(t)) isoview subplot(2,nc,2) plot2d(7*cos(t),2*sin(t)) xtitle("True ellipse") a2 = gca(); subplot(2,nc,nc+2) plot2d(7*cos(t),2*sin(t)) isoview // plot of a sphere using facets computed by eval3dp deff("[x,y,z] = sph(alp,tet)",[ "x = r*cos(alp).*cos(tet)+orig(1)*ones(tet)"; .. "y = r*cos(alp).*sin(tet)+orig(2)*ones(tet)"; .. "z = r*sin(alp)+orig(3)*ones(tet)"]); r = 3; orig = [0 0 0]; [xx,yy,zz] = eval3dp(sph,linspace(%pi/2,%pi/2,40),linspace(0,%pi*2,40)); subplot(2,nc,3) plot3d(xx, yy, zz, alpha=60, flag=[color("green") 8 4]) zlabel("isoview off", "rotation", 90, "fontsize",4) xtitle("True sphere") a3 = gca(); subplot(2,nc,nc+3) plot3d(xx, yy, zz, alpha=60, flag=[color("green") 8 4]) zlabel("isoview on", "rotation", 90, "fontsize",4) isoview // Switching isoview status for all axes isoview(gcf()) // Forcing isoview for all axes of the current figure isoview(gcf(), "on") // Relaxing isoview for the current axes isoview off // Setting isoview for top axes isoview(gcf(),"off") isoview([a1 a2 a3], "on")
See also
 replot — reframes with new boundaries the current or a given set of axes
 Axes properties — description of the axes entity properties
History
Version  Description 
6.0.0 

6.0.2  "isoview on" now forces .cube_scaling="off", and "isoview off" forces .cube_scaling="on". 
6.1  The syntax isoview(xmin, xmax, ymin, ymax) is no longer available. 
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