Merge branch 'master' of github.com:Determinant/nerv

1 files changed, 17 insertions, 0 deletions

diff --git a/matrix/init.lua b/matrix/init.lua
index 7bbc6a4..1a8925f 100644
--- a/matrix/init.lua
+++ b/matrix/init.lua
@@ -27,6 +27,23 @@ function nerv.Matrix:__tostring__()
     return table.concat(strt)
 end
 
+-- gen: a function takes take indices of the matrix and return the generated
+-- all entrys in the matrix will be assigned by calling gen(i, j)
+function nerv.Matrix:generate(gen)
+    if (self:nrow() == 1) then
+        for j = 0, self:ncol() - 1 do
+            self[j] = gen(j)
+        end
+    else
+        for i = 0, self:nrow() - 1 do
+            local row = self[i]
+            for j = 0, self:ncol() - 1 do
+                row[j] = gen(i, j)
+            end
+        end
+    end
+end
+
 nerv.MMatrixInt.fmt = "%d "
 
 function nerv.CuMatrix:__add__(b)