Re: can NN have variable number of features

Hi Greg
Greg Heath wrote:


On Jun 4, 10:29 pm, saeed <weareislamsold...@xxxxxxxxxxx>
wrote:
Hi Greg>Explain your problem and I will tell you if that
makes
sense to
me.

How many inputs (120?) and outputs (1?)

i'm using it for machine translation
were 120 is the number of word and not all sentences have 120
words
so if the sent had 5 words i do fill(pad) the empty space with
0.1
value

You didn't answer the question.

--- No. of network inputs =120
--- No. of network outputs =150

What do the inputs and outputs represent?
words in sent

Why do your outputs mean the same thing as your inputs?
i didnot get ur question but they all mean words
Why would any inputs be missing?
no
because my input is words and they are there,max of it is 120, if i
have 5 words then i do add zeros for the rest of that input row
coz i'm using newrb
Inappropriate answer.

How much data do you have for training/validation/testing

i just have training/testing
300 for training 10 for testing

You may not have enough data. How many hidden nodes do
you have? i.e., if you are considering a 120-H-1 MLP, how large is
H?
H is decided by newrb i don't have to set it
Do you mean convergence?

yes

Convergence has nothing to do with testing.
I don't understand

how come that Convergence has nothing to do with testing.

Testing does not involve iteration.

then how do u make sure that ur NN has learnt something and why
they
call testing then??

Testing involves obtaining an output given a nonlearning input.
Iteration and convergence are not involved.

I still does not get the diff between testing iteration and
convergance??

1. what you trying to do
2. what you are doing

explained above.

Not very well.

Please try again.

Hope this helps.

Greg
********************************************



Greg Heathwrote:

On Jun 4, 4:14 am, saeed
<weareislamsold...@xxxxxxxxxxx>
wrote:

You didn't answer my question:

"It would be helpful if you explained your problem and why
you
need
to
do this."

My input has max no 120
and sometimes the data are 7 or 10 in some rows
so what i did is to pad the rest of 120 by .1

Explain your problem and I will tell you if that makes
sense to
me.

How many inputs (120?) and outputs (1?)

What do the inputs and outputs represent?

Why would any inputs be missing?

How much data do you have for training/validation/testing

that's why i was asking about varaible features as
input
in NN
i don't have missing data but they are short than the
max

Why?

want to ask is my approach of padding is right
coz i get converion

Do you mean convergence?

in the training but in testing i don't get it at
all

Convergence has nothing to do with testing.
I don't understand

1. what you trying to do
2. what you are doing

Hope this helps.
It would be helpful if you explained your problem and
why you
need
to do this.

Your approach depends on your ultimate goal.

Typically, the number of inputs is fixed and missing
inputs
are
represented by a default value that depends on the
type of
problem
you have. Two examples are minimum or average values.

In some cases, missing values are estimated by
imputation. If
the expected number of missing values is more than
one,
imputation gets complicated.

Again, it depends on what you are trying to do.

Hope this helps.

Greg Heathwrote:

On May 29, 7:09 am, saeed

<weareislamsold...@xxxxxxxxxxx>



wrote:
Hi all

i want to ask if NN can have variable number
of
features.
How does it handle it, what value are
inserted and who
does it
represent this variables.
Any example of such work

It would be helpful if you explained your problem
and why
you
need
to do this.

Your approach depends on your ultimate goal.

Typically, the number of inputs is fixed and
missing
inputs are
represented by a default value that depends on
the type of
problem
you have. Two examples are minimum or average
values.

In some cases, missing values are estimated by
imputation.
If
the expected number of missing values is more
than one,
imputation gets complicated.

Again, it depends on what you are trying to do.

Hope this helps.

Greg- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -



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