DOC: Expand on matlab commands. I vomited while writing this.

README.rst

@@ -177,16 +177,18 @@ The ``readtable`` function returns a |table|_ object, which stores each column
 as a separate vector (or cell-array for non-numeric columns). If you are only
 interested in numeric columns, you can retrieve them as an array like this::
 
-    data =  data(:, vartype('numeric')).Variables;
+    rawdata =  data(:, vartype('numeric')).Variables;
 
 
 The ``readtable`` function will potentially rename the column names to ensure
 that they are are valid MATLAB identifiers. You can retrieve the original
 names from the ``table`` object like so::
 
-    colnames = regexp(data.Properties.VariableDescriptions, ...
-                      '''(.+)''', 'tokens', 'once');
-    colnames = vertcat(colnames{:});
+    colnames        = data.Properties.VariableDescriptions;
+    colnames        = regexp(colnames, '''(.+)''', 'tokens', 'once');
+    empty           = cellfun(@isempty, colnames);
+    colnames(empty) = data.Properties.VariableNames(empty);
+    colnames        = vertcat(colnames{:});
 
 
 If you have used the ``--description_file`` option, you can load in the
@@ -195,7 +197,11 @@ descriptions for each column as follows::
     descs = readtable('descriptions.tsv', ...
                       'FileType', 'text', ...
                       'ReadVariableNames',false);
-    descs = descs.Var2;
+    descs = [descs; {'eid', 'ID'}];
+    idxs  = cellfun(@(x) find(strcmp(descs.Var1, x)), colnames, ...
+                    'UniformOutput', false);
+    idxs  = cell2mat(idxs);
+    descs = descs.Var2(idxs);
 
 
 Tests