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1 ## Copyright (C) 2005 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 3 of the License, or (at |
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8 ## your option) 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, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {} hold @var{args} |
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21 ## Tell Octave to `hold' the current data on the plot when executing |
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22 ## subsequent plotting commands. This allows you to execute a series of |
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23 ## plot commands and have all the lines end up on the same figure. The |
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24 ## default is for each new plot command to clear the plot device first. |
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25 ## For example, the command |
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26 ## |
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27 ## @example |
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28 ## hold on |
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29 ## @end example |
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30 ## |
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31 ## @noindent |
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32 ## turns the hold state on. An argument of @code{"off"} turns the hold |
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33 ## state off, and @code{hold} with no arguments toggles the current hold |
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34 ## state. |
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35 ## @end deftypefn |
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36 |
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37 ## PKG_ADD: mark_as_command hold |
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38 |
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39 function hold (varargin) |
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40 |
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41 [h, varargin] = __plt_get_axis_arg__ ("hold", varargin{:}); |
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42 |
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43 hold_state = get (h, "nextplot"); |
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44 |
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45 nargs = numel (varargin); |
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46 |
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47 if (nargs == 0) |
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48 if (strcmp (hold_state, "add")) |
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49 hold_state = "replace"; |
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50 else |
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51 hold_state = "add"; |
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52 endif |
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53 elseif (nargs == 1) |
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54 state = varargin{1}; |
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55 if (ischar (state)) |
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56 if (strcmp ("off", state)) |
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57 hold_state = "replace"; |
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58 elseif (strcmp ("on", state)) |
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59 hold_state = "add"; |
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60 else |
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61 print_usage (); |
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62 endif |
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63 endif |
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64 else |
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65 print_usage (); |
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66 endif |
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67 |
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68 set (h, "nextplot", hold_state); |
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69 |
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70 endfunction |
