Data doesn't stay the same after a SaveGSS/LoadGSS round trip

[Russell Taylor]

As far as I can see this is the case almost irrespective of the options chosen, though the differences are larger in some cases than in others.

[Nick Draper]

Moved to milestone 2.4

[Nick Draper]

Some loss of metadata is unavoidable due to the limitations of the GSS format, but I beleive this ticket is refering to the counts themselves. This should be check and improved if possible.

[Nick Draper]

Moved at the code freeze for release 2.4

[Nick Draper]

Moved to r2.6 at the end of r2.5

[Nick Draper]

Moved to backlog at the code freeze for R2.6

[Nick Draper]

Bulk move to assigned at the introduction of the triage step

[Raquel Alvarez Banos]

Save and Load GSS data Re #5965

Changeset: 2ef0ebafe18a42bf2934fc24cb57a00e303ada64

[Raquel Alvarez Banos]

Save and Load GSS unit tests updated Re #5965

Changeset: 6f9bb02f5218c02e3a2a96941f762d00977cb179

[Raquel Alvarez Banos]

Revert "Save and Load GSS unit tests updated Re #5965"

This reverts commit 6f9bb02f5218c02e3a2a96941f762d00977cb179.

Changeset: aec45e86fbf4630f564efc902963b1462291a147

[Raquel Alvarez Banos]

Revert "Save and Load GSS data Re #5965"

This reverts commit 2ef0ebafe18a42bf2934fc24cb57a00e303ada64.

Changeset: 75c37e93ab4fbe7d1ffc7ac43df199b3d301d89b

[Raquel Alvarez Banos]

Load and Save GSS Re #5965

Changeset: d01f6ae4c9a22fa4693b36251e7d1b70744b8f9b

[Raquel Alvarez Banos]

On the master branch, if you try the following steps:

• Load the first spectrum in ​https://github.com/mantidproject/mantid/blob/master/Test/AutoTestData/UsageData/IRS21360.raw
• Plot spectrum
• Execute SaveGSS algorithm (RALF format)
• Load the file you have just written to a new workspace using LoadGSS
• Plot the spectrum
• Both spectra do not match

Problem: SaveGSS writes (X,Y,E) values into a file. LoadGSS reads (X,Y,E) but applies the following conversion after reading:

          xValue = (2 * xValue) - xPrev;
          yValue = yValue / (xPrev * bc4);
          eValue = eValue / (xPrev * bc4);

LoadGSS algorithm has been modified so that (Y,E) stay the same after reading (for X the conversion is OK). In addition, the option "MultiplyByBinWidth" was not working for RALF format. It is added now.

To tester:

• In this branch, follow the previous steps and check that the spectrum stays the same after the SaveGSS/LoadGSS round trip.

[Raquel Alvarez Banos]

Load and Save GSS Doc updated Re #5965

Changeset: 5d738d6effc7544630e80e637fab6979316e3fb2

[Raquel Alvarez Banos]

Merge branch 'bugfix/5965_save_and_load_GSS' of c:/Users/dsl37522/StagingMantid into bugfix/5965_save_and_load_GSS

Full changeset: ​93d0920a7ba6f60f1d0dd4221abce80b39bbf8d5

[Dan Nixon]

Merge remote-tracking branch 'origin/bugfix/5965_save_and_load_GSS'

Full changeset: ​263a9ed6dee90c836aacfaab0305e561caaee6ab

[Stuart Campbell]

This ticket has been transferred to github issue ​6811