Please help me to position the starting and ending point of data

Hello all,

I have a long set of data I need to set starting and ending position of data.

Starting position is at "M"

ending is at "I"

I need to cut all the data Starting from "M" to ending "I" and place it in to new vector.

[Geoff Hayes]

Rakesh - what is the format of this data? Are you reading it from a file or from something else? Please provide more details including a small example.

[Adam Danz]

Something like this?

newData = data(M:I); 
% or
newData = data(M:I, :):

What's the shape of your data and over what dimension are you indexing?

[Rakesh Yadav Kodari]

Hello all the data is HEXDEC

Look at the example:

Frames= M0400FEC9F93DF7EA02AFF9F308540209041B0746FA8B0351F671FAD0FC92F69706E9FCAC08EA05AB00430745F6AEFEA4F8F3F8100189F8CA087C002A064C0725FBC70382F722FAE6FDAEF8AE04D6FCA206BB0245024B0508FA5DFFBEFA84F9CB020CFBCF04FCFF9FBFF8B008FFFF70154016F0089037CFD720227FD06FF42FFE6FF16014E00AC00EE027DFEE5031AFCB0|

How can i know the position of the M and | ? and I need to divide every 4 datas in the whole frame.

for example size = Frames(1:4);

Length = Frames(5:8); ........so on but its too long any other option?

[Gani]

Use strfind

Example:

str = 'M0400FCFFFAF2F7D1046DFB3808A2039B02830741F8DB01A2F6EDF94DFECEF73A083DFE6D0826069EFE540659F5D5FCE2FA71F7BE0346F9D608D3018D05250794FA02022FF727F9B2FF5FF924059FFD5806D1035700FB050BF8FDFE4CFB20F93B0336FC520520000E032A0250FE99010DFBFCFCB8FFADFC0E0365FEE20124FFB10151FF2A006D002EFFFE019401F7FF9D02DEFDCF0112FE92FFD2FFF7FFC1013200AF013802C9FEAC02FFFCBB0011FECEFEDA01080003015501DBFFE30330FD56|';
posofM = strfind(str, 'M');
posofLast = strfind(str, '|');

Answer 1

[Gani]

Use strfind

Example:

str =  'M0400FCFFFAF2F7D1046DFB3808A2039B02830741F8DB01A2F6EDF94DFECEF73A083DFE6D0826069EFE540659F5D5FCE2FA71F7BE0346F9D608D3018D05250794FA02022FF727F9B2FF5FF924059FFD5806D1035700FB050BF8FDFE4CFB20F93B0336FC520520000E032A0250FE99010DFBFCFCB8FFADFC0E0365FEE20124FFB10151FF2A006D002EFFFE019401F7FF9D02DEFDCF0112FE92FFD2FFF7FFC1013200AF013802C9FEAC02FFFCBB0011FECEFEDA01080003015501DBFFE30330FD56|'; 
posofM = strfind(str, 'M'); 
posofLast = strfind(str, '|');

Answer 2

[KSSV]

Frames= 'M0400FEC9F93DF7EA02AFF9F308540209041B0746FA8B0351F671FAD0FC92F69706E9FCAC08EA05AB00430745F6AEFEA4F8F3F8100189F8CA087C002A064C0725FBC70382F722FAE6FDAEF8AE04D6FCA206BB0245024B0508FA5DFFBEFA84F9CB020CFBCF04FCFF9FBFF8B008FFFF70154016F0089037CFD720227FD06FF42FFE6FF16014E00AC00EE027DFEE5031AFCB0|' ;

p0 = strfind(Frames,'M') ;
p1 = strfind(Frames,'|') ;

S = Frames(p0:p1) ;
iwant = reshape(S(1:100),4,[])' ;

To reshape,,you need to have comaptibility with elements. Read about reshape

[Rakesh Yadav Kodari]

Thank you

[KSSV]

Thanks is accepting and voting the answer..:)

[Rakesh Yadav Kodari]

Reshape is picking every 4th element of the data, I need the other way for example

if we have data = 123456789

I need 12

34

56

78

[KSSV]

data = num2str(12345678)
reshape(data,2,[])'

[Rakesh Yadav Kodari]

This is the ans for the above code :

val =

'1357'

'2468'

I want 12

34

56

78

[Adam Danz]

KSSV's solution is doing what you want it to do