McIDAS-V Support Forums

Ghansham, I totally agree with you. I can update the rescaleCT code to replicate the exact bi-linear calculation, but it would be nice to have an officially supported way of performing this type of adjustment from linear to bi-linear. It would be even better to increase the number of colors when pos...

As far as getting 336 versus 254-256 colors in the table, it depends on the goal. If the goal is to reproduce an image that has the temperature values colored exactly the same as McIDAS-X, then perhaps use the bi-linear formula which would produce a color table of about 254 colors (I am not sure, so...

Hi Ghansham,

Would I want ((330-163)*2) = 334 colors (that would exceed the old number of levels)

or

(330-242.5)*2 + (242-163) = 254 colors?

I think it is the second case.

Joleen

Just a request, could you make index=0 the default so that it is backwards compatible with old scripts?

Thanks,
Joleen

Ghansham,

You are also correct that I need to adjust my code to use the full range from 0-255, I should be increasing by 0.5 degrees for each step after 242 K. I am sorry I never noticed that bug.

Joleen

Hi Ghansham, Here is a sample color table ( GA20P1.ET ) that we tend to use on water vapor. Yes, it does reduce the number of colors, it is my understanding, it also replicates the endpoints and the formula within the code in McIDAS-X for IR channels. For more colors, you might want to try importing...

Hi Ghansham, I am sorry, maybe I misunderstood your question. Many of the color tables in McV are linear, to convert them to the bi-linear, I use this function which reads the current table, converts to bilinear, outputs to an ascii file and imports it back into McV. If you need to export to a McX c...

Hi Ghansham,

I have code to write a batch from a McIDAS-V color table. I need to find it and I will send it to you.

Joleen

Post Hi, I ran into this problem again with the current problem: unit looks to be changed from kelvin to celsius, but the values are not. I was wondering if this is fixed, or am I writing this code incorrectly. If it is still broken within McV, could it be fixed or temporarily issue a warning messag...

Hi Bob,

I can't say that I have tried to use takeStepForward without capturing and image. Thank-you for digging deeper on this. Your finding is very interesting. If you use writeImage, do you have a problem with takeStepForward?

Joleen