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calculate_r_expression [2018/09/03 13:17] francisco [R Script Outputs] |
calculate_r_expression [2018/09/18 14:14] (current) francisco [R Script Outputs] |
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| outputString() | String | outputString( "myString", "This is a string" ) | | | outputString() | String | outputString( "myString", "This is a string" ) | | ||
| outputLookupTable() | LookupTable | outputLookupTable( "myLUT", c(1:10), c(1:10) * 10 ) | | | outputLookupTable() | LookupTable | outputLookupTable( "myLUT", c(1:10), c(1:10) * 10 ) | | ||
- | | outputTable() | Table | outputTable( "myTable", anyTable, 4 ) | | + | | outputTable() | Table | outputTable( "myTable", data.frame(State = c("Massachusetts", "Massachusetts"), City = c("Boston", "Chelsea"), Population = c(667137, 39398), stringsAsFactors = FALSE), 2 ) | |
In the examples above, data was constructed inside the calling functions. You can also specify variables as parameters. | In the examples above, data was constructed inside the calling functions. You can also specify variables as parameters. | ||
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* Collections of numbers are valid number vector's. | * Collections of numbers are valid number vector's. | ||
- | * A [[Lookup Table Type|Lookup Table]] requires //2// number vectors, one for the "Keys" and another for the "Values". Both vectors must have the same number of elements. | + | * A [[Lookup Table Type|Lookup Table]] requires //2// number vectors, one for the "Key" and another for the "Value". Both vectors must have the same number of elements. |
+ | |||
+ | * The ''outputTable'' function requires a table, that can be constructed with [[http://www.r-tutor.com/r-introduction/data-frame | data.frame]] R function. There is another parameter that is optional with default value 1, and it means how many Key columns the table has, from the leftmost column. | ||
+ | <note important>Notice the use of the stringAsFactors = FALSE flag. This flag prevents R from converting the passed strings to Factors(numbers).</note> | ||
==== Tables / Lookup Tables ==== | ==== Tables / Lookup Tables ==== | ||
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=== Lookup Tables === | === Lookup Tables === | ||
- | Lookup Tables are transferred to R as a List with two columns, "Keys" and "Values". | + | Lookup Tables are transferred to R as a List with two columns, "Key" and "Value". |
Each column can be individually accessed by using the ''$'' operator, for example: | Each column can be individually accessed by using the ''$'' operator, for example: | ||
- | * ''t1$Keys[ 1 ]'' will access the first key of the Lookup Table ''t1''. | + | * ''t1$Key[ 1 ]'' will access the first key of the Lookup Table ''t1''. |
- | * ''t2$Values[ 2 ]'' will access the second value of the Lookup Table ''t2'' | + | * ''t2$Value[ 2 ]'' will access the second value of the Lookup Table ''t2'' |
=== Tables === | === Tables === | ||
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Expression: | Expression: | ||
<code rsplus> | <code rsplus> | ||
- | for ( i in 1:length( t1$Values ) ) { | + | for ( i in 1:length( t1$Value ) ) { |
- | tempValue <- t1$Values[ i ]; | + | tempValue <- t1$Value[ i ]; |
- | t1$Values[ i ] = tempValue * tempValue; | + | t1$Value[ i ] = tempValue * tempValue; |
} | } | ||
- | outputLookupTable( "poweredTable", t1$Keys, t1$Values ); | + | outputLookupTable( "poweredTable", t1$Key, t1$Value ); |
</code> | </code> | ||
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Expression: | Expression: | ||
<code rsplus> | <code rsplus> | ||
- | tableMean <- mean( t1$Values ); | + | tableMean <- mean( t1$Value ); |
print( paste( "Mean is", tableMean ) ); | print( paste( "Mean is", tableMean ) ); | ||
outputDouble( "mean", tableMean ); | outputDouble( "mean", tableMean ); | ||
</code> | </code> | ||
- | Noticed the ''print()'' statement? Dinamica EGO's Message Log will show output messages from the R script (as Result's). | + | Noticed the ''print()'' statement? Dinamica EGO's Message Log will show output messages from the R script (as Result's).<note warning>If the Message Log level is Unconditional, the messages will not be printed.</note> |
==== Plot passed Lookup Table to an image on the path specified by passed String ==== | ==== Plot passed Lookup Table to an image on the path specified by passed String ==== |