I have a dataset file in which uno is a column.
{ weight,wtind } = indices(dataset,"uno"). Here, when I'm printing wtind it's giving the column number of uno and in case of weight the output is +DEN. What does this mean?
1 Answer
0
indices is an older GAUSS function. The first return from indices is a character vector. Character vectors were how GAUSS dealt with text way back before it had string arrays.
A character vector packs text inside of a matrix element. There is no special indication that the matrix contains text, so the standard print statement will interpret the data as floating point numeric data and you will see +DEN, because that sort of data is not valid floating point data. +DEN stands for "denormal".
To tell GAUSS to print the data in a character vector as string data, you have to prepend the data with a dollar sign. Here is an example which will work with one of the example datasets that ships with GAUSS.
// Get the file name with full path
fname = getGAUSSHome() $+ "examples/cancer.dat";
// Find the index of the variable stage
{ name, idx } = indices(fname, "stage");
print $name;
print idx;This will code will print
stage 3.0000
Your Answer
1 Answer
indices is an older GAUSS function. The first return from indices is a character vector. Character vectors were how GAUSS dealt with text way back before it had string arrays.
A character vector packs text inside of a matrix element. There is no special indication that the matrix contains text, so the standard print statement will interpret the data as floating point numeric data and you will see +DEN, because that sort of data is not valid floating point data. +DEN stands for "denormal".
To tell GAUSS to print the data in a character vector as string data, you have to prepend the data with a dollar sign. Here is an example which will work with one of the example datasets that ships with GAUSS.
// Get the file name with full path
fname = getGAUSSHome() $+ "examples/cancer.dat";
// Find the index of the variable stage
{ name, idx } = indices(fname, "stage");
print $name;
print idx;This will code will print
stage 3.0000