Understood. But, to better illustrate what I was trying to say, when I compare
BGYPAL2 viewmat i.256 (((i.256)e.15*i.18)#BGYPAL2) viewmat i.256 The 18 entry palette looks slightly smoother, to me, than the 256 entry palette. (I see the same issue, to a lesser extent, with BYPAL3.) And, of course, I already mentioned that I couldn't see a difference between a two entry (black,white) palette and GRAYPAL. I don't know if that's an artifact of my system, or maybe my eyes are wonky. But it's something to think about. Thanks, -- Raul On Tue, Sep 7, 2021 at 5:06 PM Devon McCormick <[email protected]> wrote: > > I suspect there are duplicate entries in that one because it was the first > one I generated. The other two are tweaked versions where I was more > careful to avoid duplicates. > > On Tue, Sep 7, 2021 at 2:38 PM Raul Miller <[email protected]> wrote: > > > Got it. > > > > And, these are all 256 row palettes. So, using them with viewmat i.256 > > shows their full details. > > > > That said, to my eye, these look identical: > > > > GRAYPAL viewmat i.256 > > (0 0 0,:255) viewmat i.256 > > > > I do see some subtle differences between BGYPAL and BGYPAL2 / BGYPAL3 > > > > I was noticing things in there like brightnessAdjust and MYPLOT and > > wondering about them. But I can ignore them if they're not relevant. > > > > On the other hand, > > $BGYPAL > > 256 3 > > $~.BGYPAL > > 254 3 > > > > I suppose it might be useful to have repeated palette entries, to > > suppress some details from view? > > > > Thanks, > > > > -- > > Raul > > > > On Tue, Sep 7, 2021 at 12:56 PM Devon McCormick <[email protected]> > > wrote: > > > > > > The main results you might care about are the resulting palettes in the > > > globals ADJPAL, BGYPAL, BGYPAL2, BGYPAL3, FULLSPECPAL, and GRAYPAL. > > > The "BGY..." ones are limited to blue, green, and yellow, from dark to > > > light. The others are as documented; all are an attempt to put colors > > in a > > > logical, linear order so there are numerous ways to accomplish this as > > can > > > be seen by comparing FULLSPECPAL to ADJPAL. > > > FULLSPECPAL: black->dark > > > blue->green->cyan->purple->red->orange->yellow->almost white > > > ADJPAL: black->dark > > > blue->green->greyish->purple->red->orange->yellow->almost white > > > GRAYPAL: black->shades of gray->white > > > BGYPALn: Blue->Green->Yellow palettes (hand-tweaked) > > > > > > > > > On Tue, Sep 7, 2021 at 11:48 AM Raul Miller <[email protected]> > > wrote: > > > > > > > Well, this line threw an error: > > > > > > > > NB* sombrero: the "sombrero" function > > > > (https://en.wikipedia.org/wiki/Sombrero_function) > > > > > > > > After fixing that NB, I got it to load. > > > > > > > > That said, it has some stuff in it that I can't use (for example, LD) > > > > and I'm not sure what all of it does. I'll have to find time to > > > > experiment with it. > > > > > > > > Thanks, > > > > > > > > -- > > > > Raul > > > > > > > > On Tue, Sep 7, 2021 at 10:22 AM Devon McCormick <[email protected]> > > > > wrote: > > > > > > > > > > Okay, I've added "stepsftn" - it was it a utility file that I have > > loaded > > > > > by default. > > > > > Please let me know if you notice any other missing routines. > > > > > > > > > > Thanks, > > > > > > > > > > Devon > > > > > > > > > > On Tue, Sep 7, 2021 at 12:43 AM Raul Miller <[email protected]> > > > > wrote: > > > > > > > > > > > I thought that I had searched for roundNums on that page and not > > found > > > > > > a definition. > > > > > > > > > > > > That said, I see it now, > > > > > > > > > > > > That said, it's used on that page before it's defined. > > > > > > > > > > > > That said, now that I have it defined, I am getting a value error > > on > > > > > > stepsftn which I see referenced 10 times on that page (but no > > > > > > definition -- I've triple checked, and am not seeing a definition > > for > > > > > > stepsftn).. > > > > > > > > > > > > I imagine we can work through this, but I'm not there yet > > > > > > > > > > > > Thanks, > > > > > > > > > > > > -- > > > > > > Raul > > > > > > > > > > > > On Tue, Sep 7, 2021 at 12:27 AM Devon McCormick < > > [email protected]> > > > > > > wrote: > > > > > > > > > > > > > > "roundNums" is the last definition on the page. Did you copy > > the > > > > whole > > > > > > > thing? > > > > > > > > > > > > > > > > > > > > > On Mon, Sep 6, 2021 at 9:41 PM Raul Miller < > > [email protected]> > > > > > > wrote: > > > > > > > > > > > > > > > I get a value error on roundNums when I try loading that > > script. > > > > > > > > > > > > > > > > For a black and white (and shades of gray) palette, I guess I > > like > > > > 0 0 > > > > > > > > 0,:255 > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > > > > > > > > -- > > > > > > > > Raul > > > > > > > > > > > > > > > > > > > > > > > > On Mon, Sep 6, 2021 at 8:33 PM Devon McCormick < > > [email protected] > > > > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > There are a number of palettes I have found useful here: > > > > > > > > > > > https://code.jsoftware.com/wiki/User:Devon_McCormick/Palettes . > > > > > > > > > > > > > > > > > > On Mon, Sep 6, 2021 at 3:16 PM Raul Miller < > > > > [email protected]> > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > I was poking through the viewmat code, and noticed a couple > > > > things > > > > > > > > > > that might be of interest. > > > > > > > > > > > > > > > > > > > > First, is that viewmat has a default palette, which you > > can see > > > > > > here: > > > > > > > > > > > > > > > > > > > > load'viewmat' > > > > > > > > > > viewmat i.6 > > > > > > > > > > > > > > > > > > > > Viewmat uses linear interpolation between the palette > > colors to > > > > > > > > > > represent position in the range of values it's displaying. > > > > > > > > > > > > > > > > > > > > If you want to see how it blends, you could do something > > like > > > > this: > > > > > > > > > > viewmat i.60 > > > > > > > > > > > > > > > > > > > > If you want to supply your own palette, you can do that > > also. > > > > > > Palettes > > > > > > > > > > are three column lists of colors, with 0 0 0 for black, > > 255 0 > > > > 0 for > > > > > > > > > > red, 0 255 0 for green, 0 0 255 for blue and 255 255 255 > > for > > > > white. > > > > > > > > > > > > > > > > > > > > For example: > > > > > > > > > > (255*=i.3) viewmat i.3 > > > > > > > > > > (255*#:i.8) viewmat i.8 > > > > > > > > > > > > > > > > > > > > Finally, getvm1_jviewmat_ generates the bitmap it uses. > > > > > > > > > > > > > > > > > > > > For example: > > > > > > > > > > 0 {:: ''getvm1_jviewmat_ i.3 3 > > > > > > > > > > 255 40959 65471 > > > > > > > > > > 65311 8388352 16768768 > > > > > > > > > > 16727808 16711775 16711935 > > > > > > > > > > > > > > > > > > > > The left argument is not optional, and is the palette (the > > > > default > > > > > > > > > > palette for an empty left argument). Each pixel in the > > bitmap > > > > is > > > > > > one > > > > > > > > > > integer. So another way to see the default palette is: > > > > > > > > > > > > > > > > > > > > 256#.inv 0 {:: ''getvm1_jviewmat_ i.6 > > > > > > > > > > 0 0 255 > > > > > > > > > > 0 255 255 > > > > > > > > > > 0 255 0 > > > > > > > > > > 255 255 0 > > > > > > > > > > 255 0 0 > > > > > > > > > > 255 0 255 > > > > > > > > > > > > > > > > > > > > (Note that there's a leading 1 dimension on this result, > > since > > > > a > > > > > > > > > > bitmap is a rank 2 array. You could use {. to discard that > > > > leading > > > > > > > > > > dimension.) > > > > > > > > > > > > > > > > > > > > FYI, > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > Raul > > > > > > > > > > > > > > > > > > ---------------------------------------------------------------------- > > > > > > > > > > For information about J forums see > > > > > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > > > > > > > Devon McCormick, CFA > > > > > > > > > > > > > > > > > > Quantitative Consultant > > > > > > > > > > > > > > > > > ---------------------------------------------------------------------- > > > > > > > > > For information about J forums see > > > > > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > ---------------------------------------------------------------------- > > > > > > > > For information about J forums see > > > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > > > Devon McCormick, CFA > > > > > > > > > > > > > > Quantitative Consultant > > > > > > > > > > > ---------------------------------------------------------------------- > > > > > > > For information about J forums see > > > > http://www.jsoftware.com/forums.htm > > > > > > > > ---------------------------------------------------------------------- > > > > > > For information about J forums see > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > Devon McCormick, CFA > > > > > > > > > > Quantitative Consultant > > > > > > > ---------------------------------------------------------------------- > > > > > For information about J forums see > > http://www.jsoftware.com/forums.htm > > > > ---------------------------------------------------------------------- > > > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > -- > > > > > > Devon McCormick, CFA > > > > > > Quantitative Consultant > > > ---------------------------------------------------------------------- > > > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > -- > > Devon McCormick, CFA > > Quantitative Consultant > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
