How to read a single value or a specific range?

[Simone98]

Hi, I'm opening a hdf5 of 40gb, and I'm trying to get some data without opening all the dataset.
I have this:

And with them i can read data from a 3 dimensional array.

Storing all the dataset in an array and then cicling it is impossible, because it's way too much for the array maximum limit.
Is there a way to get only the wanted values using three indexes?

Sorry if I used the wrong place to ask.

[LiorBanai]

Hi. This is good place to ask.

I can add partial read but I don't understand the current dataset structure. Could you add example file (small one) and give example of slice data you would like to read?

I can work on this with good datase for testing.

[Simone98]

HRS_ITA_1KM_LEAFWET_HOURLY_CREATED.zip

This is an example file.
It has a small dataset of float[,,].

The real one has these dimensions:
float[timespans, lat, long] => float[16775,1281,1729]

It would be super useful in terms of memory to read only 1 timespan for each cycle, in that case i would get only 1281*1729 floats everytime, without being worry about the size of the array.

[LiorBanai]

Thanks. I'll work on the next week

[LiorBanai]

@Simone98 btw if you only need read of hdf5 I high recommend https://github.com/Apollo3zehn/HDF5.NET library as it has pure .net implementation and it seems to support partial read per the readmd

[Simone98]

Thank you for the suggestion @LiorBanai. After hours spent on the various docs I successfully read the files without loading all of it at once.

Thank you for the help, I solved my problem with the Apollo3zehn solution.

[LiorBanai]

Glad to know it helped you. I do planned to add that ability also to my library later on but it is good you are not blocked on this