Added a "decimals" parameter to write_ftsv, so that datasets can be written

without full precision. Defaults to 7 digits after decimal point.

fluents/dataset.py

@@ -437,7 +437,7 @@ class Selection(dict):
         self[axis] = labels
     
 
-def write_ftsv(fd, ds):
+def write_ftsv(fd, ds, decimals=7):
     """Writes a dataset in fluents tab separated values (ftsv) form.
     
     @param fd: An open file descriptor to the output file.
@@ -449,6 +449,7 @@ def write_ftsv(fd, ds):
         fd = open(fd, 'w')
         opened = True
 
+    printstr = "%s\t"
     # Write header information
     if isinstance(ds, CategoryDataset):
         type = 'category'
@@ -456,6 +457,7 @@ def write_ftsv(fd, ds):
         type = 'network'
     elif isinstance(ds, Dataset):
         type = 'dataset'
+        printstr = '%%.%df\t' % decimals
     else:
         raise Exception("Unknown object")
     print >> fd, "# type: %s" % type
@@ -477,7 +479,7 @@ def write_ftsv(fd, ds):
     y, x = m.shape
     for j in range(y):
         for i in range(x):
-            print >> fd, "%s\t" % m[j, i], 
+            print >> fd, printstr % m[j, i], 
         print >> fd
 
     if opened: