gvsig-geoprocess / org.gvsig.geoprocess / trunk / org.gvsig.geoprocess / org.gvsig.geoprocess.app / org.gvsig.geoprocess.app.mainplugin / src / main / resources-plugin / help / en / es.unex.sextante.tables.filterVector / filtervector.xml @ 537
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>
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<help>
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<element name="DESCRIPTION" text="This algorithm filters a vector layer, creating a new one that contains just those features that pass the specified filter. A filter is defined as a mathematical expression. If the expression applied to the values of a feature yields a non-zero or true value, the features passes the filter." description="Description" type="0"> |
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</element>
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<element name="ADDITIONAL_INFO" text="" description="Additional information" type="0"> |
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</element>
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<element name="EXTENSION_AUTHOR" text="Victor Olaya" description="Algorithm created by" type="0"> |
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</element>
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<element name="HELP_AUTHOR" text="Victor Olaya" description="Help file created by" type="0"> |
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</element>
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<element name="USER_NOTES" text="" description="User notes" type="0"> |
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</element>
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<element name="LAYER" text="The vector layer to filter." description="Layer" type="3"> |
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</element>
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<element name="FORMULA" text="The expression to use as filter. Notes on general syntax: To add a field, just enter its name. Functions: *sin(x): returns the sine of x (x should be in radians). *cos(x): returns the cosine of x (x should be in radians). *tan(x): returns the tangent of x (x should be in radians). *asin(x): returns the archsine of x (x should be in radians). *acos(x): returns the archcosine of x (x should be in radians). *atan(x): returns the archcotangent de x (x should be in radians). *atan2(x,y): returns the archcotangent of x/y (x/y should be in radians). *sinh(x): returns the hyperbolic sine of x (x should be in radians). *cosh(x): returns the hyperbolic cosine of x (x should be in radians). *atanh(x): returns the inverse hyperbolic tangent of x (x should be in radians). *In(x): returns the logarithm of x. *log(x): returns the base-10 logarithm. *exp(x): returns the exponential function of x. *abs(x): returns the absolute value of x. *rand(): returns a random value within the range 0-1. *mod(x,y): returns the module of x/y. *sqrt(x): returns the positive square root of x. Operators. The precedence of operators is as usual : + and - are evaluated after · y /, and these after the power operator. Use parenthesis in case of doubt, to be sure of how the program will evaluate the introduced formula. *+ (add) *- (subtract) *x(multiplication) */ (division) *% (modulus) *! (NOT) *^ (powero) *&& (AND) *|| (OR) *(less than) *> (more than) *= (less or equal to) *>= (more or equal to) *== (equal to) *!= (different from) Constants. *Pi *e If, for a given feature, a field used in the formula has an invalid value, that feature will not pass the filter." description="Formula" type="3"> |
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</element>
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<element name="OUTPUT_DESCRIPTION" text="" description="Description" type="2"> |
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</element>
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<element name="RESULT" text="The filtered layer, containing only those layers that passed the filter." description="Result" type="2"> |
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</element>
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</help>
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<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>
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