• KX Academy

  advanced capstone project 1.4

  Posted by masmail on April 17, 2024 at 11:24 am

  I’m getting a “rank: Invalid rank or valence (parameter count)” when running this code for 1.4. everything seems to be fine apart from the last line 🤷‍♂️

  eventData:select from event where date=2020.01.02
  sensorData:select from sensor where date=2020.01.02
  lap:.f1.createLapTable[eventData;sensorData];
  f1DbPath:`:./f1/;
  lap:update `sym$sensorId from lap;
  .Q.dpft[f1DbPath;lap;2020.01.02;lap;sensorId];

  megan_mcp replied 7 months, 1 week ago 2 Members · 1 Reply
• 1 Reply

• 

  megan_mcp

  Administrator

  April 17, 2024 at 11:52 am

  Hi @masmail

  I believe this error is due to the way you structured your .Q.dpft function.

  If you take a look at the screenshot provided you will see that this namespace only accepts 4 arguments;

  • d is a directory handle
  • p is a partition of a database
  • f is a field of the table named by t below
  • t the name (as a symbol) of a simple table whose columns are vectors or compound lists

  The first two parameters are correct [f1DbPath;2020.01.02, ..] however you need to take a look at the order of your second two.

  Let me know if this helps!

  Thanks,

  Megan

  

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