ncsize: handle scalar, vector more accurately

Author: scivision

+stdlib/+hdf5nc/ncsize.m

@@ -16,6 +16,11 @@
 
 assert(isfile(file), "%s not found", file)
 
-fsize = ncinfo(file, variable).Size;
+dsi = ncinfo(file, variable);
+if isempty(dsi.Dimensions)
+  fsize = [];
+else
+  fsize = dsi.Size;
+end
 
 end

+stdlib/TestNetCDF.m

@@ -83,8 +83,7 @@ function test_size(tc)
 basic = tc.TestData.basic;
 
 s = ncsize(basic, 'A0');
-tc.verifyThat(s, IsScalar)
-tc.verifyEqual(s, 1)
+tc.verifyEmpty(s)
 
 s = ncsize(basic, 'A1');
 tc.verifyThat(s, IsScalar)

Readme.md

@@ -97,12 +97,18 @@ If dataset exists, the existing dataset shape must match the variable.
 ncsave(filename, variable_name, variable)
 ```
 
+---
+
 Get the dataset size (shape)
 
 ```matlab
 ncsize(filename, variable_name)
 ```
 
+A scalar disk variable will return empty `[]`.
+
+---
+
 Get the names of all datasets in a file
 
 ```matlab