how to create features.npy

[tanjia123456]

hello, I want to use my own datasets.
I read the content of the features.npy. I don't particularly understand what it means. For my own data set, I only used six features, but there are 10242 nodes. could you please explain it for me? thank you very much

[tanjia123456]

by the way, My feature.txt:
0.7245457172393799 0.4196268618106842 1.5336203575134277 0.164371058344841 0.8012768626213074 1.0819106101989746
0.7234553098678589 -0.21186740696430206 1.734088659286499 -0.06575702875852585 1.5461986064910889 1.7907339334487915
0.6976118683815002 -0.8227556943893433 2.3467843532562256 -0.2127690464258194 2.2652621269226074 0.9431747794151306
0.6093224287033081 -0.14362403750419617 2.435741662979126 -0.15672996640205383 2.0035109519958496 0.6626314520835876
0.7962069511413574 0.6636443734169006 2.6822612285614014 0.17569522559642792 1.5047622919082642 1.7475523948669434
0.6638727188110352 0.43941426277160645 2.1869468688964844 0.22917543351650238 0.9992952346801758 0.755111575126648
0.42158350348472595 -0.4673236608505249 2.0045557022094727 -0.11204257607460022 0.952077329158783 1.080317497253418
0.6262625455856323 1.0736969709396362 2.5959184169769287 0.1840747743844986 1.0091643333435059 1.0856961011886597
0.292637437582016 0.5271306037902832 3.8740134239196777 -0.25046491622924805 2.7822771072387695 3.4222073554992676
0.6965793371200562 0.2986766993999481 1.8267978429794312 0.18818221986293793 0.8655451536178589 1.0916707515716553
0.29859286546707153 -0.18992017209529877 1.5285135507583618 0.2433326542377472 0.4716634452342987 1.706255555152893