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How to calculate interpolated value in a table?

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  1. #1
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    How to calculate interpolated value in a table?

    Dear Excel experts, Please help me. I am working on ship.
    I have a table as per attached. I have to calculate manually many times in a day. Manual calculation is very tidious , annoying and take too much time to complete. I need automatic calculation.

    Example : when I enter any Draft value which is not mentioned in table, such as 4.432 ,must be come out exact interpolated value for DISPMT,LCB,LCF,TKM,MTC,TPC etc. In the table draft difference between the two is 0.1 meter. But actual draft of the ship is not exactlly as table, actual draft value is always between the two drafts.

    Kindly help me which function to be used and how to calculate to obtain interpolated exact value for any draft value which is not mentioned in the table.

    Thank you very much for your kind attention and help.
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    Last edited by sein; 12-07-2009 at 08:59 PM. Reason: forget to attach

  2. #2
    Forum Expert shg's Avatar
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    Re: How to calculate interpolated value in a table?

    See attached.
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    Entia non sunt multiplicanda sine necessitate

  3. #3
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    Re: How to calculate interpolated value in a table?

    Quote Originally Posted by shg View Post
    See attached.
    Dear Guru,
    I really appreciated for your kind help. Now I am very happy because I can calculate automatically.It is very fast and come out exact values.Your help is exactly what I want.I need to learn from you.

    Thanks again for you prompt reply and kind help.

  4. #4
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    Re: How to calculate interpolated value in a table?

    I think you forgot about MTC must be +50 cm and -50 cm from draft
    Last edited by imadlatch; 11-23-2014 at 07:55 AM.

  5. #5
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    Re: How to calculate interpolated value in a table?

    I think you forgot about MTC must be +50 cm and -50 cm from draft
    for exp
    draft MTC+50 c at 1.50 = 45.00 then interpolation must return the value at draft 2.00 = 77 and the same for MTC-50 cm
    1.00 33
    1.50 45
    2.00 77
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