textscan - multiple format lines

I have a txt file with these data:

Dose Cycle = 1

Dosing Time (ms) = 57

Start Pressure (psi) = 0.00

End Pressure (psi) = 0.05

Battery Start Voltage (mV) = 10

Battery End Voltage (mV) = 110

I want to read this file and extract these info.

fid = fopen('nums1.txt');

C = textscan(fid, '%s %s %s %s %s %f\n');

But each line has different fromat, how can I do this for each line?

Can anyone offer any suggestions.

Thanks!

Answer 1

[Rik]

It looks like the same format to me. Why not read as text, split on the = and use str2double on the last column?

To read your file to a cell array you can use my |readfile| function link. If you're on R2020b or later you can use readlines instead (which will return a string vector, but split will still work).

txt={'Dose Cycle =	 1'
'Dosing Time (ms) =	57'
'Start Pressure (psi)       =	 0.00 '
'End Pressure   (psi)       =	 0.05 '
'Battery Start Voltage (mV) =	 10'
'Battery End Voltage   (mV) =	 110'};
res=split(txt,'=')

res = 6×2 cell array
    {'Dose Cycle '                }    {'→ 1'    }
    {'Dosing Time (ms) '          }    {'→57'    }
    {'Start Pressure (psi)       '}    {'→ 0.00 '}
    {'End Pressure   (psi)       '}    {'→ 0.05 '}
    {'Battery Start Voltage (mV) '}    {'→ 10'   }
    {'Battery End Voltage   (mV) '}    {'→ 110'  }

str2double(res(:,2))

ans = 6×1

1.0000 57.0000 0 0.0500 10.0000 110.0000

[Vahideh Ansari Hosseinzadeh]

Thanks for your reply. Is it possible to use MATLAb built-in function? Because I have some headers, several blocks in txt file, that I'm going to work on.

[Rik]

readlines is builtin, and it is easy to download my readfile function (on R2017a and newer you can even use the AddOn Manager).

So I don't know if I fully understand what your problem is with my suggestion.