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1 ### Copyright (C) 1996 John W. Eaton |
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2 ### |
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3 ### This file is part of Octave. |
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4 ### |
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5 ### Octave is free software; you can redistribute it and/or modify it |
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6 ### under the terms of the GNU General Public License as published by |
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7 ### the Free Software Foundation; either version 2, or (at your option) |
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8 ### any later version. |
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9 ### |
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10 ### Octave is distributed in the hope that it will be useful, but |
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11 ### WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ### General Public License for more details. |
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14 ### |
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15 ### You should have received a copy of the GNU General Public License |
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16 ### along with Octave; see the file COPYING. If not, write to the Free |
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17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ### 02111-1307, USA. |
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19 |
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20 ## usage: axis () |
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21 ## axis ([xmin, xmax]) |
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22 ## axis ([xmin, xmax, ymin, ymax]) |
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23 ## axis ([xmin, xmax, ymin, ymax, zmin, zmax]) |
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24 ## |
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25 ## Sets the axis limits. |
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26 ## |
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27 ## With no arguments, turns autoscaling on. |
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28 ## |
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29 ## If your plot is already drawn, then you need to REPLOT before |
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30 ## the new axis limits will take effect. |
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31 |
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32 function curr_axis = axis (ax) |
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33 |
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34 ## This may not be correct if someone has used the gnuplot interface |
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35 ## directly... |
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36 |
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37 global __current_axis__; |
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38 |
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39 if (! exist ("__current_axis__")) |
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40 __current_axis__ = [-10, 10, -10, 10]; |
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41 endif |
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42 |
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43 if (nargin > 1) |
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44 usage ("axis ([xmin, xmax, ymin, ymax, zmin, zmax])"); |
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45 endif |
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46 |
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47 if (nargin == 0) |
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48 set autoscale; |
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49 curr_axis = __current_axis__; |
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50 elseif (is_vector (ax)) |
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51 |
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52 len = length (ax); |
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53 |
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54 if (len != 2 && len != 4 && len != 6) |
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55 error ("axis: expecting vector with 2, 4, or 6 elements"); |
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56 endif |
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57 |
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58 __current_axis__ = reshape (ax, 1, len); |
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59 |
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60 if (len > 1) |
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61 eval (sprintf ("set xrange [%g:%g];", ax (1), ax (2))); |
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62 endif |
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63 |
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64 if (len > 3) |
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65 eval (sprintf ("set yrange [%g:%g];", ax (3), ax (4))); |
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66 endif |
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67 |
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68 if (len > 5) |
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69 eval (sprintf ("set zrange [%g:%g];", ax (5), ax (6))); |
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70 endif |
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71 |
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72 else |
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73 error ("axis: expecting no args, or a vector with 2, 4, or 6 elements"); |
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74 endif |
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75 |
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76 endfunction |
