Update wiki re #4464

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>

Code/Mantid/Framework/DataHandling/src/LoadAscii.cpp

@@ -6,15 +6,13 @@ By default the algorithm attempts to guess which lines are header lines by tryin
 
 The format can be one of:
 * Two columns: 1st column=X, 2nd column=Y, E=0
-* For a workspace of ''n'' spectra, 2''n''+1 columns: 1''st'' column=X, 2i''th'' column=Y, 2i+1''th'' column =E
-* Four columns: 1st column=X, 2nd column=Y, 3rd column=E, 4th column=DX (X error)
+* For a workspace of ''n'' spectra, 2''n''+1 columns: 1''st'' column=X, 2i''th'' column=Y, 2i+1''th'' column =E.
+* For a workspace of ''n'' spectra, 2''n''+2 columns: 1''st'' column=X, 2i''th'' column=Y, 2i+1''th'' column =E and column=DX (X error) as last column.
 
 The number of bins is defined by the number of rows.
 
 The resulting workspace will have common X binning for all spectra.
 
-This algorithm cannot load a file created by [[SaveAscii]] if it has X errors written and several spectra.
-
 
 *WIKI*/
 //----------------------------------------------------------------------

Code/Mantid/Framework/DataHandling/src/SaveAscii.cpp

@@ -1,9 +1,12 @@
 /*WIKI* 
 
-The workspace data are stored in the file in columns: the first column contains the X-values, followed by pairs of Y and E values. Columns are separated by commas. The resulting file can normally be loaded into a workspace by the [[LoadAscii]] algorithm.
+The workspace data are stored in the file in columns: the first column contains the X-values, followed by pairs of Y and E values. 
+If requested, the last column will contain X errors. 
+Columns are separated by commas. The resulting file can normally be loaded into a workspace by the [[LoadAscii]] algorithm.
 
 ==== Limitations ====
-The algorithm assumes that the workspace has common X values for all spectra (i.e. is not a [[Ragged Workspace|ragged workspace]]). Only the X values from the first spectrum in the workspace are saved out. 
+The algorithm assumes that the workspace has common X values for all spectra (i.e. is not a [[Ragged Workspace|ragged workspace]]). 
+Only the X values from the first spectrum in the workspace are saved out. 
 
 *WIKI*/
 //----------------------------------------------------------------------
@@ -66,7 +69,7 @@ namespace Mantid
       declareProperty("WorkspaceIndexMax", EMPTY_INT(), mustBePositive,"The ending workspace index.");
       declareProperty(new ArrayProperty<int>("SpectrumList"),"List of workspace indices to save.");
       declareProperty("Precision", EMPTY_INT(), mustBePositive,"Precision of output double values.");
-      declareProperty("WriteXError", false, "If true, the error on X will be written as the fourth column.");
+      declareProperty("WriteXError", false, "If true, the error on X will be written as the last column.");
 
       declareProperty("CommentIndicator", "", "Character(s) to put in front of comment lines.");
 
@@ -82,7 +85,7 @@ namespace Mantid
       }
 
       declareProperty("Separator", "CSV", boost::make_shared<StringListValidator>(sepOptions),
-        "Character(s) to put as separator between X, Y, E values.");
+        "Character(s) to put as separator between the columns.");
 
       declareProperty(new PropertyWithValue<std::string>("CustomSeparator", "", Direction::Input),
         "If present, will override any specified choice given to Separator.");