Converting txt file string to matrix.

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Hannah Taylor
Hannah Taylor 2020-3-31
评论： Hannah Taylor 2020-3-31
I have an unhelpful txt file containing a string that looks something like:
{co-ordinates 1.5 2.5 4.8 weighting 11.7}{co-ordinates 2.5 2.8 1.7 weighting 21.4}{co-ordinates 1.5 2.5 4.8 weighting 11.7} .... etc
I'm trying to create a matrix with 4 collums (x co-ord, y co-ord, z co-ord, weighting) from this string. The co-ordinated are separated by a single space, the co-ords and weighting is separated by a double space.
Thanks in advance.
  2 个评论
Hannah Taylor
Hannah Taylor 2020-3-31
Is this similar to sscanf? I've been looking into this but unsure how to go about the 'format spec' part to say e.g. 'read the number after 'co-ordiantes ''

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Stephen23
Stephen23 2020-3-31
编辑：Stephen23 2020-3-31
>> str = '{co-ordinates 1.5 2.5 4.8 weighting 11.7}{co-ordinates 2.5 2.8 1.7 weighting 21.4}{co-ordinates 1.5 2.5 4.8 weighting 11.7}';
>> mat = sscanf(str,'{co-ordinates%f%f%f weighting%f}',[4,Inf]).'
mat =
1.5 2.5 4.8 11.7
2.5 2.8 1.7 21.4
1.5 2.5 4.8 11.7
  1 个评论
Hannah Taylor
Hannah Taylor 2020-3-31
Thanks that's really helpful! I was struggling to understand the format spec part of sscanf but this has really helped :) life saver!!!

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