predictr {rnn}

Recurrent Neural Network

Description

predict the output of a RNN model

Usage

predictr(model, X, hidden = FALSE, real_output = T, ...)

Arguments

model

output of the trainr function

X

array of input values, dim 1: samples, dim 2: time, dim 3: variables (could be 1 or more, if a matrix, will be coerce to array)

hidden

should the function output the hidden units states

real_output

option used when the function in called inside trainr, do not drop factor for 2 dimension array output and other actions. Let it to TRUE, the default, to let the function take care of the data.

...

arguments to pass on to sigmoid function

Value

array or matrix of predicted values

Examples

## Not run:  
# create training numbers
X1 = sample(0:127, 10000, replace=TRUE)
X2 = sample(0:127, 10000, replace=TRUE)

# create training response numbers
Y <- X1 + X2

# convert to binary
X1 <- int2bin(X1)
X2 <- int2bin(X2)
Y  <- int2bin(Y)

# Create 3d array: dim 1: samples; dim 2: time; dim 3: variables.
X <- array( c(X1,X2), dim=c(dim(X1),2) )

# train the model
model <- trainr(Y=Y[,dim(Y)[2]:1],
                X=X[,dim(X)[2]:1,],
                learningrate   =  1,
                hidden_dim     = 16 )
             
# create test inputs
A1 = int2bin( sample(0:127, 7000, replace=TRUE) )
A2 = int2bin( sample(0:127, 7000, replace=TRUE) )

# create 3d array: dim 1: samples; dim 2: time; dim 3: variables
A <- array( c(A1,A2), dim=c(dim(A1),2) )
    
# predict
B  <- predictr(model,
               A[,dim(A)[2]:1,]     )
B = B[,dim(B)[2]:1]
# convert back to integers
A1 <- bin2int(A1)
A2 <- bin2int(A2)
B  <- bin2int(B)
 
# inspect the differences              
table( B-(A1+A2) )

# plot the difference
hist(  B-(A1+A2) )

## End(Not run)