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5 | <title>different.pro (SAXO Documentation Assistant)</title> |
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45 | <table border="0" cellpadding="0" cellspacing="0" width="98%" bgcolor="#F0F0FF" valign="bottom"> |
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46 | <tr> |
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47 | <td width="10%"> |
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48 | <a href="cmset_op.html"><img src="./../prev.gif" border="0" alt="Previous"></a></td> |
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49 | <td width="80%" align="center" valign="center"> |
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50 | <font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../home.html">Overview</a></font></td> |
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51 | <td width="10%" align="right"> |
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52 | <a href="extrac2.html"><img src="./../next.gif" border="0" alt="Next"></a></td> |
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53 | </tr> |
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54 | </table> |
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55 | |
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56 | |
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57 | <h1><font size="-2">Matrix/</font></h1> |
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58 | <h2>different.pro</h2> |
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59 | |
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60 | <dl> |
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61 | </dl> |
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62 | |
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63 | |
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64 | calculate the different elements of 2 matrix of positive whole numbers. |
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65 | |
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66 | |
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67 | |
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68 | |
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69 | |
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70 | <a name="#_different"></a> |
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71 | |
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72 | <h2>different <font size="-1" color="#006633"> |
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73 | Calculation |
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74 | </font></h2> |
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75 | |
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76 | <p><font face="Courier"><i>result = </i>different(<i><a href="#_different_keyword_a">a</a>, <a href="#_different_keyword_b">b</a></i>)</font></p> |
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77 | |
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78 | |
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79 | |
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80 | |
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81 | <h3>Return value</h3> |
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82 | tableau |
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83 | |
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84 | |
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85 | |
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86 | <h3>Parameters</h3> |
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87 | |
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88 | |
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89 | <a name="#_different_keyword_a"></a> |
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90 | <h4>a |
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91 | <font size="-1" color="#006633">in</font> |
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92 | |
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93 | |
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94 | <font size="-1" color="#006633">required</font> |
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95 | |
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96 | |
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97 | |
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98 | |
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99 | </h4> |
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100 | |
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101 | |
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102 | arrays of positive integers, which need |
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103 | not be sorted. Duplicate elements are ignored, as they have no |
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104 | effect on the result |
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105 | |
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106 | |
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107 | |
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108 | <a name="#_different_keyword_b"></a> |
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109 | <h4>b |
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110 | <font size="-1" color="#006633">in</font> |
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111 | |
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112 | |
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113 | <font size="-1" color="#006633">required</font> |
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114 | |
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115 | |
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116 | |
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117 | |
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118 | </h4> |
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119 | |
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120 | |
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121 | see a |
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122 | |
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123 | |
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124 | |
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125 | |
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126 | |
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127 | |
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128 | <h3>Examples</h3><pre> |
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129 | |
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130 | IDL> a = [2,4,6,8] |
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131 | IDL> b = [6,1,3,2] |
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132 | IDL> different(a,b) = [ 4, 8] ; Elements in A but not in B |
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133 | |
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134 | </pre><h3>Version history</h3> |
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135 | |
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136 | <h4>Version</h4> |
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137 | $Id: different.pro 232 2007-03-20 16:59:36Z pinsard $ |
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138 | |
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139 | <h4>History</h4> |
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140 | <a href="http://www.dfanning.com/tips/set_operations.html"/> |
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141 | |
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142 | |
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143 | |
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144 | <h3>Known issues</h3> |
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145 | |
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146 | |
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147 | |
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148 | <h4>Restrictions</h4> |
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149 | The empty set is denoted by an array with the first element equal to |
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150 | -1. |
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151 | |
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152 | |
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153 | These functions will not be efficient on sparse sets with wide |
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154 | ranges, as they trade memory for efficiency. The HISTOGRAM function |
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155 | is used, which creates arrays of size equal to the range of the |
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156 | resulting set. |
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157 | |
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158 | |
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166 | |
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167 | <font size="-3"><p> </p></font> |
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168 | <hr size="1" color="#CCCCCC"/> |
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169 | |
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170 | |
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171 | |
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172 | |
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173 | <p><font color="gray" size="-3"> Produced by IDLdoc 2.0.</font></p> |
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174 | |
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175 | </body> |
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176 | </html> |
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