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Jul 10, 2015 9:55 AM
(1623 views)

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Jul 13, 2015 10:08 AM
(2708 views)

Solution

What version of JMP are you using?

We've changed this behavior with JMP 12. Functions in the formula editor now respect the Missing Value Code property. Earlier versions (as you've discovered) didn't do this.

If you want to account for this in your conversion in JMP 11 and earlier you'll need to put a conditional in your formula.

If(:Temp Kelvin == -9999, -9999, :Temp Kelvin - 272.15)

-Jeff

-Jeff

6 REPLIES

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Jul 13, 2015 10:08 AM
(2709 views)

What version of JMP are you using?

We've changed this behavior with JMP 12. Functions in the formula editor now respect the Missing Value Code property. Earlier versions (as you've discovered) didn't do this.

If you want to account for this in your conversion in JMP 11 and earlier you'll need to put a conditional in your formula.

If(:Temp Kelvin == -9999, -9999, :Temp Kelvin - 272.15)

-Jeff

-Jeff

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Jul 21, 2015 9:08 AM
(1354 views)

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Jul 21, 2015 10:07 AM
(1354 views)

No need for JMP 12. Here's an example IF statement that averages three columns if none of them are -9999:

if **(**:Temp_Kelvin != -**9999** &

:Temp2_Kelvin != -**9999** &

:Temp3_Kelvin != -**9999**,

** (**:Temp_Kelvin + :Temp2_Kelvin + :Temp3_Kelvin**)** / **3**;

**)**;

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Jul 21, 2015 10:18 AM
(1354 views)

Thanks PMRoz, but I'm wondering if I can take the average of the two columns that don't have -9999 (if there is one column missing), or just use the value from the one column that has data (if both other values are missing). For example:

Soil temp 1, Soil temp 2, Soil temp 3

287.1, 289.3, 288.6

-9999, 286.6, 287.9

-9999, 287.5, -9999

-9999, -9999, -9999

I want to take the average of all three values in the first line, cols 2 and 3 in the second line, use the value from col 2 in the third line, and return a -9999 for the fourth. Is this possible with conditional statements?

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Jul 21, 2015 11:20 AM
(1354 views)

This could do it.

**(**match**(**:Temp_Kelvin, -**9999**, **0**, :Temp_Kelvin**)** +

match**(**:Temp2_Kelvin, -**9999**, **0**, :Temp2_Kelvin**)** +

match**(**:Temp3_Kelvin, -**9999**, **0**, :Temp3_Kelvin**)** **)**

/

**(**match**(**:Temp_Kelvin, -**9999**, **0**, **1)** +

match**(**:Temp2_Kelvin, -**9999**, **0**, **1)** +

match**(**:Temp3_Kelvin, -**9999**, **0**, **1)** **)**

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Jul 21, 2015 11:29 AM
(1354 views)

The **MATCH** function does the trick. From the Scripting guide:

**Match**

You can use the Match() function to make several equality comparisons without needing to rewrite the value to be compared. The syntax is:

Match**(**x, value1, result1, value2, result2, **...**, resultElse**)**

For example, the following script recodes gender abbreviations in **Big Class.jmp**:

For Each Row**(**

sex = Match**(** sex, "F", "Female", "M", "Male", "Unknown" **)**

**)**;