ifplot()draws a graph of real zeros of a bi-variate function. Function
conplot()plots the contour lines for a same argument. Function
plot()draws the graph of a uninivariate function. These functions are available on UNIX version (on
300] for UNIX version;
2] for each variable.) If this specification is omitted, the indeterminate having the higher order in func is taken for `x' and the one with lower order is taken for `y'. To change this selection, specify explicitly by xrange and/or yrange. For an uni-variate function, the specification is mandatory.
conplot(). The format is [v,vmin,vmax
]]. If step is specified, the height difference of contours is set to (vmax-vmin)/step. ([z,
Plot.) The created window is titled name:n/m which means the m-th window of the process with process number n. These numbers are used for
plotover()superposes reals zeros of its argument bi-variate function onto the specified window.
precisebutton switch is inactive. If
preciseis selected and active, the area specified by the cursor dragging will be rewritten on the same window. This will be explained later.
conplot(), and drag the cursor with the middle mutton. Then you will find the contour lines changing their colors depending on the movement of the cursor and the corresponding height level displayed on the upper right corner of the window.
ox_plotredraws the specified area more precisely by integer arithmetic. This mode uses bisection method based on Sturm sequence computation to locate real zeros precisely. More precise plotting can be expected by this technique than by the default plotting technique, at the expense of significant increase of computing time. As you see by above explanation, this function is only effective to polynomials with rational coefficients. (Check how they differ for (x^2+y^2-1)^2.)
limit stacksize 16mfor an example.
X, e.g., coloring, shape of buttons etc. The default setting of resources is shown below. For
plot*form*shapeStyleyou can select among rectangle, oval, ellipse, and roundedRectangle.
plot*background:white plot*form*shapeStyle:rectangle plot*form*background:white plot*form*quit*background:white plot*form*wide*background:white plot*form*precise*background:white plot*form*formula*background:white plot*form*noaxis*background:white plot*form*xcoord*background:white plot*form*ycoord*background:white plot*form*level*background:white plot*form*xdone*background:white plot*form*ydone*background:white
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