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-rw-r--r--samples/matlab/s017_opTomo.m8
1 files changed, 8 insertions, 0 deletions
diff --git a/samples/matlab/s017_opTomo.m b/samples/matlab/s017_opTomo.m
index 4886cc5..e23b53d 100644
--- a/samples/matlab/s017_opTomo.m
+++ b/samples/matlab/s017_opTomo.m
@@ -1,3 +1,11 @@
+% This sample illustrates the use of opTomo.
+%
+% opTomo is a wrapper around the FP and BP operations of the ASTRA Toolbox,
+% to allow you to use them as you would a matrix.
+%
+% This class requires the Spot Linear-Operator Toolbox to be installed.
+% You can download this at http://www.cs.ubc.ca/labs/scl/spot/
+
% load a phantom image
im = phantom(256);
% and flatten it to a vector