Need help in understanding fprintf command and its application

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Hussain Hayat 2015-7-14

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https://ww2.mathworks.cn/matlabcentral/answers/229855-need-help-in-understanding-fprintf-command-and-its-application

评论： Star Strider 2015-7-14

采纳的回答： Star Strider

fprintf( ’%8sVIII\n’, ’Henry’ )

fprintf( ’%-8sVIII\n’, ’Henry’ )

fprintf( ’%.3sVIII\n’, ’Henry’ )

Can someone help me with this? I cant figure out what the fprintf does. Especially the part before Henry in this. Please explain all three so I can use it properly.

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Answer 1

Star Strider 2015-7-14

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To begin with, the quote syntax is wrong. This is correct:

fprintf( '%8sVIII\n', 'Henry' )
fprintf( '%-8sVIII\n', 'Henry' )
fprintf( '%.3sVIII\n', 'Henry' )
     HenryVIII
  Henry   VIII
  HenVIII

The first one right-justifies ‘Henry’ in the 8-character string field (the default behaviour), the second one left-justifies it (note the minus-sign in front of the 8), and the third one, with a 3-character string field, takes only the first three letters and right-justifies them.

See the documentation on format descriptors in the fprintf documentation for all the details.