#-------------------------------------------------------------
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
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#-------------------------------------------------------------


# Load matrix X
X = read($1)
type = $2

# Perform the operations
s = 2
if( type == 1 ) {
  R = X - (s * (X!=0))
}
else if( type == 2 ) {
  R = (X!=0) * log(X)
  # SystemDS and R treat Nan differently
  R = ifelse(is.nan(R), 1.0E308, R)
  R = ifelse(R==0, 1.0E308, R)
}
else if( type == 3 ) {
  R = (X!=0) * log(X, 0.5)
  # SystemDS and R treat Nan differently
  R = ifelse(is.nan(R), 1.0E308, R)
  R = ifelse(R==0, 1.0E308, R)
}


# Write the result matrix R
write(R, $3)
