In quantitative trading, high-frequency factor calculation based on financial market L1/L2 quotations and transaction high-frequency data is a common investment research requirement. As the amount of financial market data continues to increase, traditional relational databases have been unable to meet the storage and query needs of large-scale data. In order to cope with this challenge, […]
Tag: hdf5
Comparison of Python + HDF5 factor calculation and DolphinDB integrated factor calculation scheme
In quantitative trading, it is a very common investment research requirement to perform high-frequency factor calculation based on L1/L2 quotations and high-frequency trading data in the financial market. At present, the L2 historical data of the domestic market for ten years is about 20 ~ 50T, and the amount of new data added every day […]
NCL reads hdf5 files–taking AMSR2 sea ice density data as an example
Since most calculations are performed on the server. Therefore, it is considered to improve the level of NCL and Shell scripts. The previous blog post Python reads HDF5 and introduces HDF5 files and its reading and writing. However, due to the old system version of the server itself and the reason of the intranet, it […]
[Solved] ArchR reports “Error in H5Fopen(file) : HDF5. File accessibility. Unable to open file.\ “
Very disgusting error report, I tried for a long time but couldn’t solve it, and finally reinstalled ArchR and it ran normally It was difficult to install ArchR on the server at first, and it was barely usable through conda, but many packages need to be manually loaded when running ArchR. This error is probably […]
[Solved] The solution to the exception of opening hdf5 (.h5) files in R language under Linux
On June 10th, I downloaded the expression matrix h5 format file uploaded by the author from the GEO database. It is necessary to extract the expression matrix from it and then reconstruct the Seurat analysis object; the exp_matrix.hdf5 file is on my Windows system. , you can open and read the file content by two […]