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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
// Copyright (C) 2011 - DIGITEO - Michael Baudin
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function levels = contour2d(x, y, z, nz, style, strf, leg, rect, nax, void)
[lhs, rhs] = argn(0);
if rhs == 0 then
scf();
levels = contour2d(1:10, 1:10, rand(10,10), 5, rect = [0, 0, 11, 11]);
return;
end
if rhs < 4 then
error(msprintf(gettext("%s: Wrong number of input argument(s): At least %d expected.\n"), "contour2d", 4));
end
if type(x) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real vector expected.\n"), "contour2d", 1));
end
if type(y) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real vector expected.\n"), "contour2d", 2));
end
if type(z) <> 1 & type(z) <> 13 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix or Scilab function expected.\n"), "contour2d", 3));
end
if type(nz) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix expected.\n"), "contour2d", 4));
end
if ~isvector(x) then
error(999, msprintf(gettext("%s: Wrong size for input argument #%d: Real vector expected.\n"), "contour2d", 1));
end
if ~isvector(y) then
error(999, msprintf(gettext("%s: Wrong size for input argument #%d: Real vector expected.\n"), "contour2d", 2));
end
opts = [];
levels = [];
if ~exists("style", "local") then
if size(nz, "*") == 1 then
style = 1:nz;
else
style = 1:size(nz, "*");
end
end
if exists("strf", "local") then
yflag = part(strf, 2);
if or(yflag == ["2" "4" "6" "8"]) then
rect = [min(x), min(y), max(x), max(y)];
yflag = string(evstr(yflag) - 1);
strf = part(strf, 1) + yflag + part(strf, 3);
end
opts = [opts,"strf=strf"];
end
if exists("leg", "local") then
opts = [opts, "leg=leg"];
end
rectSpecified = %f;
if exists("rect","local") then
opts = [opts, "rect=rect"];
rectSpecified = %t;
end
if exists("nax","local") then
opts = [opts, "nax=nax"];
end
if exists("logflag","local") then
opts = [opts, "logflag=logflag"];
end
if exists("frameflag","local") then
opts = [opts,"frameflag=frameflag"];
else
frameflag = [];
end
if exists("axesflag","local") then
opts = [opts, "axesflag=axesflag"];
end
opts = strcat([opts, "style=style(c)"], ",");
if or(type(z) == [11 13]) then
fun = z;
//to avoid redfinition warning
clear z
if type(fun) == 11 then
comp(fun);
end
z = feval(x, y, fun);
end
[xc, yc] = contour2di(x, y, z, nz);
fpf = xget("fpf");
if fpf == "" then
fpf = "%.3g";
end
fig = gcf();
a = gca();
autoc = a.auto_clear;
if autoc == "on" then
if ~isempty(a.children) then
delete(a.children);
end
end
v = fig.immediate_drawing;
fig.immediate_drawing = "off";
a.auto_clear = "off";
cnt = 0;
// we draw the contour with call to plot2d for each level line
// however the data_bounds will be always reset after each plot
// so we must compute before the bounding rectangle (xmin,ymin,xmax,ymax)
// and give it to each plot2d. This is useful for frameflag = (2,4,6,8)
// since the data_bounds are given by the extrema of x and y
if ( frameflag == 2 | frameflag == 4 | frameflag == 6 | frameflag == 8 )
// get the bounding rectangle
rect = [min(x), min(y), max(x), max(y)];
// set the option accordingly
if ~rectSpecified then
opts = strcat([opts, "rect=rect"], ",");
end
// the rect will be taken into account
frameflag = frameflag - 1 ;
elseif (~rectSpecified) then
// get rect any way for clipping
rect = [min(x), min(y), max(x), max(y)];
end
k = 1;
n = yc(k);
c = 0;
level = %inf;
while k < length(xc)
n = yc(k);
if xc(k) ~= level then
c = c + 1;
level = xc(k);
levels = [level levels];
if cnt>0 then
glue(a.children(1:cnt));
cnt = 0;
end
end
err = execstr("plot2d(xc(k + (1:n)), yc(k + (1:n))," + opts + ")", "errcatch", "m");
frameflag = 0;
// add a test to see if plot2d call succeed
// and, if not, restore good figure property values before exiting
if err <> 0
mprintf(gettext("Error %d : in plot2d called by contour2d"), err);
fig.immediate_drawing = v;
a.auto_clear = autoc;
return;
end
unglue(a.children(1))
cnt = cnt + 1;
if stripblanks(fpf) <> "" then
labelText = " " + msprintf(fpf, level);
labelPos = [xc(k + 1 + n/2), yc(k + 1 + n/2)];
labelBox = stringbox(labelText, labelPos(1), labelPos(2));
// check that the text is not outside the box
// better than clipping to avoid half cut strings
if labelBox(1,1) > rect(1) & labelBox(2,1) > rect(2) & ..
labelBox(1,3) < rect(3) & labelBox(2,3) < rect(4) then
xstring(labelPos(1), labelPos(2), labelText)
e = gce();
e.clip_state = "off";
cnt = cnt + 1;
end
end
k = k + n + 1;
end
if cnt > 0 then
glue(a.children(1:cnt));
cnt = 0;
end
set("current_entity", a);
fig.immediate_drawing = v;
endfunction
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