nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

How do extract parts of a binary file and evaluate them separately?

lala

Hello!

For example this file with this script can get the first data is a date.

How do I use a script to extract this "A2 3F 32 01"
and use a script to calculate its corresponding decimal value= 20070306

Thanks!

00820070306.zip

Accepted answers

All comments

lala

This will not reverse success

bb = Load Text File( "I:\E\00820070306.zst", blob() );
ymd = Blob To Matrix( bb, "uint", 4, "little", 8 );

a=Munger(char(bb),contains(char(bb),"(")+4,12);
b=Char To blob(a, "utf-8" );;
mat=blobtomatrix(b, "uint", 4, "little", 8 );

jthi

Maybe BLOB Peek(blob, offset, length) would work? Also this might be a good watch Importing Binary Data with JSL (2022-EU-45MP-946)

lala

Thanks!

txnelson

Your code

bb = Load Text File( "I:\E\00820070306.zst", blob() );
ymd = Blob To Matrix( bb, "uint", 4, "little", 8 );

is creating a 2 dimensional matrix you are calling "ymd" with the values converted to decimal values. All you have to do, is to create a new data table, then create a new column and set the values in the new column to the first column in the matrix ymd.

Names Default To Here( 1 );

bb = Load Text File( "I:\E\00820070306.zst", blob() );
ymd = Blob To Matrix( bb, "uint", 4, "little", 8 );

dt = New Table( "zst" );
dt << New Column( "col 1" );
	Column( dt, 1 ) << set values( ymd[0, 1] );

Then just repeat it for the remaining 7 columns in the matrix

lala

Thank Jim!

Yes, I got this code from Craige.

This code is useful when it knows the binary data structure.

But this new file I don't know its data structure.I'm on a quest.

I'm wrapping this file at 00 intervals.I get the data for this.

Except for the first line which I know contains the date.

But the data starting in the second line is integer data, floating point data.But which field is a floating point, or an integer.I don't know.

I can only restore the comparison field by field.

I still haven't figured it out yet.

txnelson

Best of luck