Last change
on this file since 392 was
373,
checked in by pinsard, 16 years ago
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improvements of headers (examples and results)
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-
Property svn:keywords set to
Id
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File size:
1.2 KB
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1 | ;+ |
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2 | ; @file_comments |
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3 | ; Send back a vector or a matrix constituted of 0 and 1 in alternation |
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4 | ; |
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5 | ; @categories |
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6 | ; Matrix |
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7 | ; |
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8 | ; @param n1 {in}{required} {type=integer} |
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9 | ; number of elements in the first dimension |
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10 | ; |
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11 | ; @param n2 {in} {type=integer} |
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12 | ; number of elements in the second dimension |
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13 | ; |
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14 | ; @examples |
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15 | ; |
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16 | ; IDL> a=zero_one(3) |
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17 | ; IDL> help,a |
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18 | ; A FLOAT = Array[3] |
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19 | ; IDL> print,a |
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20 | ; 0.00000 1.00000 0.00000 |
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21 | ; |
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22 | ; IDL> a=zero_one(2,3) |
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23 | ; IDL> help,a |
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24 | ; A FLOAT = Array[2, 3] |
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25 | ; IDL> print,a |
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26 | ; 0.00000 1.00000 |
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27 | ; 1.00000 0.00000 |
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28 | ; 0.00000 1.00000 |
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29 | ; |
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30 | ; @returns |
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31 | ; an array of n1 dimension or n1xn2 dimensions |
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32 | ; |
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33 | ; @history |
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34 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
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35 | ; 1/12/98 |
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36 | ; |
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37 | ; @version |
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38 | ; $Id$ |
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39 | ; |
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40 | ;- |
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41 | FUNCTION zero_one, n1,n2 |
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42 | ; |
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43 | compile_opt idl2, strictarrsubs |
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44 | ; |
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45 | CASE N_PARAMS() OF |
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46 | 1:return, findgen(n1) mod 2 |
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47 | 2:BEGIN |
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48 | if fix(n1/2) EQ n1/2. then BEGIN ;even number of columns |
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49 | res = findgen(n1+1,n2) mod 2 |
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50 | return, res[0:n1-1, *] |
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51 | ENDIF ELSE return, findgen(n1,n2) mod 2 ;odd number of columns |
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52 | END |
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53 | else: return, report('bad number of arguments') |
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54 | endcase |
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55 | end |
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