Hi friends,
i am trying to implement such a function
int
cmd_quick_cluster (struct lexer *lexer, struct dataset *ds)
{
const struct dictionary *dict = dataset_dict (ds);
struct variable *v = dict_get_weight (dict);
struct variable **variables;
int n;
lex_match (lexer, T_SLASH);
if (!lex_force_match_id (lexer, "VARIABLES")) printf("Variables must be
defined");
lex_match(lexer, T_EQUALS);
if (!parse_variables_const (lexer, dict, &variables, &n,PV_NUMERIC))
printf("Cannot parse variables");
printf("Number of variables :%d\n",n);
return(CMD_SUCCESS);
}
for the K-means clustering. probably, at least the \VARIABLES and the \GROUPS
parameters must be implemented in the QUICK CLUSTER command. I learnt how to
parse command line, as you see, i can hold the number of variables and the
selected variables in a doubled (struct variable**) variable.
Because of the nearly perfect abstraction, i can't reach the data itself. I
need
to handle the data as doubles. What is the easiest way to grab the raw values
from datasets?
________________________________
From: John Darrington <[email protected]>
To: Mehmet Hakan Satman <[email protected]>
Cc: John Darrington <[email protected]>; [email protected]
Sent: Thu, March 10, 2011 2:07:55 PM
Subject: Re: K-Means Clustering
On Thu, Mar 10, 2011 at 03:35:33AM -0800, Mehmet Hakan Satman wrote:
Note: If i am not wrong, "implementing such a command in PSPP" means
making
the
k-means clustering codes be callable using the
"QUICK CLUSTER x y /MISSING=LISTWISE
/CRITERIA=CLUSTER(2) MXITER(10) CONVERGE(0)
/METHOD=KMEANS(NOUPDATE)
/PRINT INITIAL ANOVA CLUSTER DISTAN."
syntax. is that right?
That's right. But I would start with something simpler. Say just
"QUICK CLUSTER x y z". The syntax parser can be a bit challenging
so keep it simple to start with, and add the options later.
You'll need to write a function of the form:
int cmd_quick_cluster (struct lexer *lexer, struct dataset *ds);
and register it in the file src/language/command.def
I suggest that you look at some of the existing examples to get
an idea of how it works. reliability.c is probably a good example.
also: I have no experience about coding GTK+
The first step will be to get the command written. You or someone
else can write the GUI for it later.
Good luck.
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