MATLAB: Remove units from a string

MATLABmatlab gui

Hello all,

I would like to remove the units (for e.g. seconds) from a string and convert it to double.

For e.g.: 1.00s to 1.00 or 1.25ns to 1.25

Is there any simple way to do that?

Thanks.

Best Answer

s = '1.25ns';
v = sscanf(s, '%f')

Related Solutions

MATLAB: Extracting parts of a string

The following code uses regexp to extract the data you want. You can play around with the expression here .

 data = fileread('00000090Head.txt');
 expression = '(?<=WAV;\s*)(\d*)(?:;\s*\d*;\d;\d;(.*?(?=;));\s*\d*\.\d*;\s*)(-?\d*)';
 [tokens,match] = regexp(data,expression,'tokens','match');
 sampleFrequency = cellfun(@(x) x(1,1),tokens);
 position = cellfun(@(x) x(1,2),tokens);

Position and sampleFrequency are both 1x183 cell arrays and contain the data you are interested in.

position = {'-10000' '-9000' '-8000' '-7000' '-6000' '-5000' '-4500' '-4000' '-3500' '-3000' ................}

sampleFrequency = {'22000' '22000' '22000' '22000' '22000' '22000' '22000' '22000' '22000' '22000' .................}

MATLAB: Could someone help me put this in a for loop

This is a frequently asked question:

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

While it is possible, you generally do not want to do it.

You can create intX by doing

x = raw_data(:, 1:2:10);
y = raw_data(:, 2:2:10);
intX = x(:);
intY = y(:);

Best Answer

Related Solutions

MATLAB: Extracting parts of a string

MATLAB: Could someone help me put this in a for loop

Related Question