Nothing
modelGradientCheck <-
function(model, ...) {
params = modelExtractParam(model, only.values=FALSE)
names = names(params)
if (length(names) == 0) {
for (i in 1:model$nParams)
names[[i]] = paste('Param ', i, sep="")
}
if (length(names) != length(params))
stop('Names array does not match length of params array')
L = 0
change = 1e-6
origParams = params
diff = matrix(0, 1, length(params))
for (i in 1:length(params)) {
params[i] = origParams[i] + change
Lplus = modelObjective(params, model, ...)
params[i] = origParams[i] - change
Lminus = modelObjective(params, model, ...)
diff[i] = (Lplus - Lminus)/(2*change)
params[i] = origParams[i]
}
anal = modelGradient(origParams, model, ...)
delta = anal-diff
paramMaxDiff = max(abs(diff-anal))
if (paramMaxDiff > 100*change) {
l = 0
for (i in 1:length(names)) {
if (l < length(names[[i]]))
l = length(names[[i]])
}
print('analytic diffs delta')
for (i in 1:length(names)) {
if(abs(delta[i]/max(c(abs(anal[i]), 1))) >= 1e-4) {
spaceLen = l - length(names[[i]])
# space = char(repmat(32, 1, spaceLen));
print(paste(names[[i]],':', round(c(anal[i], diff[i], diff[i]-anal[i]),6), sep=""))
}
}
}
print(paste('Param max diff: ', round(paramMaxDiff,6), sep=''))
}
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