\caption{\textbf Variation   of   average   grain   size   of   nanostructured NiFe2O4   with  milling  time.  The  continuous  line  is  guide  to the eye.}%

This is my code. I am getting weird error saying 'missing number, treated as zero'. How can I rectify it?

  • 2
    Show a complete example that can be used for tests. Replace the 1fig.jpg by a dummy e.g. example-image. – Ulrike Fischer Nov 11 '19 at 18:38
  • 1
    I agree with @Ulrike. Reproducing the problem and finding out what the problem is will be much easier. Have you loaded all the necessary packages, for example? – Michael Chatiskatzi Nov 11 '19 at 19:04

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