Read in Strings to vtkTableNode?

Development
1

Hello,

Whenever I try to use the slicer.util.updateTableFromArray() function to import an array with a string value - say “DeviceID” - I get the error “ValueError: could not convert string to float: ‘DeviceID’”

Numerical arrays work just fine but string arrays, object arrays, or anything that isn’t exclusively numbers fails. If I pass an array of strings that are numbers - for instance np.array([[‘0’, ‘0’, ‘0’]])which could be seen as the equivalent of np.zeros((1,3)).astype(str) - the table reads it in but still has columns with Data type set to float when examined in Slicer’s Table module.

Is there a better way to import string or mixed tables through code?

2

slicer.util.updateTableFromArray() only works for numeric types (as VTK only offers array mapping for these types). You can set string elements one by one:

column = tableNode.GetTable().GetColumn(0)

column.InsertNextValue("asdf")
column.InsertNextValue("zxcv")
column.InsertNextValue("qwerty")

tableNode.GetTable().Modified()