for some reason, my model is not running. I created a model matrix to run a simple model with the package neuralnet. I know it might be challenging to debug other people code especially without the data but in case you think you could assist me here is the code:
library(tidyverse)
library(neuralnet)
#Activity 1 Load Data
featchannels <-read.csv("features_channel.csv")
trainTargets <-read.table("traintargets.txt")
#Activity 2 Normalize every column of the features dataset using min-max
normalization to range [0-1].
normalized <- function(x) {
return((x-min(x)) /(max(x) -min(x)))
}
featchannels <- normalized(featchannels)
#Activity 3 Add a target feature named response to the features dataset
with 0-1 values read from trainTargets.txt, with 1 indicating P300
response and 0 otherwise.
colnames(trainTargets)[1] <- "State"
featchannels <- cbind(featchannels, trainTargets)
# Changing rows to P300 and others.
featchannels <- within(featchannels, State <- factor(State, labels =
c("Other", "P300")))
featchannels$State <- as.factor(featchannels$State)
#4. Take the first 3840 rows of the dataset as the training data set, and
the remaining 960 rows as the testing data set.
training <- featchannels[1:3840,]
testing <- featchannels[3841:4800,]
enter code here
#Activitry 6
#Creating model matrix before runing the model
df_comb_training <- training
y <- model.matrix(~ df_comb_training$State + 0, data = df_comb_training[,
c('State'), drop=FALSE])
# fix up names for as.formula
y_feats <- gsub("^[^ ]+\\$", "", colnames(y))
colnames(y) <- y_feats
df_comb_training <- df_comb_training[, !(colnames(df_comb_training) ==
"State")]
feats <- colnames(df_comb_training)
df_comb_training <- cbind(y, df_comb_training)
# Concatenate strings
f <- paste(feats, collapse=' + ')
y_f <- paste(y_feats, collapse=' + ')
f <- paste(y_f, '~', f)
# Convert to formula
f <- as.formula(f)
model_h5 <- neuralnet(f, df_comb_training, stepmax = 1e+08, hidden = 5)
