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When I try to crate a grid of parameters for training with caret I get various errors: ------------------------------------------------------------ > my_grid <- createGrid("rf") Error in if (p <= len) { : argument is of length zero > my_grid <- createGrid("rf", 4) Error in if (p <= len) { : argument is of length zero > my_grid <- createGrid("rf", len=4) Error in if (p <= len) { : argument is of length zero The doc...

...example, for the method randomForest one can tune mtry in the call to train. But the function call to train random forests in the original package has many other parameters, e.g. sampsize, maxnodes, etc. Is there **any** way to access these parameters using train in caret? (Is the function caret::createGrid limited to the list of parameters specified in the caret documentation, it's not super clear if the list of parameter is for all the caret APIs). Thanks, James, [[alternative HTML version deleted]]

...t;cv", number=3, preProcOptions=NULL, classProbs = TRUE, summaryFunction = twoClassSummary) trX <- data.frame(replicate(nR, rnorm(nCol))) trY <- runif(1)*trX[,1]*trX[,2]^2+runif(1)*trX[,3]/trX[,4] trY <- as.factor(ifelse(sign(trY)>0,'X1','X0')) my.grid <- createGrid(method.name, grid.len, data=trX) my.model <- train(trX,trY,method=method.name,trace=FALSE,trControl=myCtrl,tuneGrid=my.grid, metric="ROC") print("Done") The error I get is: task 2 failed - "arguments imply differing number of rows: 1334, 666" However, everythi...

...ntrol} created") - evt.skip - end - - evt_grid_cell_change() do |evt| - set_status_text("Cell #{evt.get_row} x #{evt.get_col} has changed") - end - end - - # Create a wxGrid object - def make_grid(panel) - @grid = Wx::Grid.new(panel, -1) - - # Then we call CreateGrid to set the dimensions of the grid - # (11 rows and 12 columns in this example) - @grid.create_grid( 20, 12 ) - @grid.set_default_cell_background_colour(Wx::WHITE) - # We can set the sizes of individual rows and columns - # in pixels, and the label value string - @grid.set_row_size...

...ntrol} created") + evt.skip + end + + evt_grid_cell_change() do |evt| + set_status_text("Cell #{evt.get_row} x #{evt.get_col} has changed") + end + end + + # Create a wxGrid object + def make_grid(panel) + @grid = Wx::Grid.new(panel, -1) + + # Then we call CreateGrid to set the dimensions of the grid + # (11 rows and 12 columns in this example) + @grid.create_grid( 20, 12 ) + @grid.set_default_cell_background_colour(Wx::WHITE) + # We can set the sizes of individual rows and columns + # in pixels, and the label value string + @grid.set_row_size...

Hi, Thanks to the newly added event handlers for Wx::Grid in the 0.6.0 release, I can now provide a much slicker intreface to my "data widgets" which heavily rely on that control. However, I haven''t quite figured out how to programmatically scroll to the last row of a populated grid (actually, the first empty row). So say that I have a grid with 200 rows only 20 of which