Search found 126 matches

by dlachieze
Fri Oct 05, 2018 8:45 pm
Forum: Software Library
Topic: Statistic
Replies: 4
Views: 201

Re: Statistic

It seems that you don't have enough registers available. If you do RCL REGS what is the size of the REGS matrix in X? You can allocate more registers with the SIZE function (shift MODES down arrow) For example SIZE 0025 should be enough. Another possibility is that you have inadvertently deleted the...
by dlachieze
Tue Oct 02, 2018 10:14 pm
Forum: DM42
Topic: DM42 : What a beauty !
Replies: 8
Views: 493

Re: DM42 : What a beauty !

Stéphane Th wrote:
Tue Oct 02, 2018 2:20 pm
So, finally had some time to draw this modules port expander:
What kind of modules are you considering ? What would be the hardware interface to the DM42? How would they be supported in the DM42 software?
by dlachieze
Fri Sep 28, 2018 8:23 am
Forum: Usage tips, tricks and problem reports
Topic: SUM, MEAN & SDEV don't lift the stack
Replies: 20
Views: 613

Re: SUM, MEAN & SDEV don't lift the stack

So the only exception from a sensitive stack handling seems to be the HP-29C/19C as reported by Thomas. And the HP-67, 41C, and 42S, which may go back to the HP-65 in this matter. Have to check. The first HP calculator with 2 variables stat functions is the HP-55. On the HP-55 MEAN and SDEV are ove...
by dlachieze
Fri Sep 28, 2018 5:15 am
Forum: Usage tips, tricks and problem reports
Topic: SUM, MEAN & SDEV don't lift the stack
Replies: 20
Views: 613

Re: SUM, MEAN & SDEV don't lift the stack

On the 32s and the 32sii you recall separately the mean of x and the mean of y, not both at the same time. If you recall the mean just after the last Sigma+, it replaces the content of X (stack lift is disabled after Sigma+), if there is another operation enabling stack lift after the last Sigma+ th...
by dlachieze
Thu Sep 27, 2018 9:30 am
Forum: Usage tips, tricks and problem reports
Topic: SUM, MEAN & SDEV don't lift the stack
Replies: 20
Views: 613

Re: SUM, MEAN & SDEV don't lift the stack

Does anybody have the necessary machines at hand to check what DIM? and RCLIJ and L.R. do in real life? On the 42s: DIM? replaces the matrix in X by the dimensions (columns & rows) in X & Y, pushing Y content to Z, Z content to T and placing the matrix in L T: t T: z Z: z Z: y Y: y => Y: rows X: Ma...
by dlachieze
Sun Sep 23, 2018 10:38 pm
Forum: Discuss!
Topic: 43S Poll (yes, here is one!)
Replies: 26
Views: 1281

Re: 43S Poll (yes, here is one!)

I choosed the one on the far left: I don't like the two on the right because the light background around the screen makes the yellow and blue marks difficult to see (not enough contrast). It makes also the small black border around the screen area much more visible and any variation in the screen / ...
by dlachieze
Fri Sep 21, 2018 4:30 am
Forum: Usage tips, tricks and problem reports
Topic: Adding elements to matrix programmatically
Replies: 4
Views: 292

Re: Adding elements to matrix programmatically

Is there a way to insert an element into the matrix by using GROW mode without creating a new one afterwards ? Is there a way to first create a new empty matrix element and then insert the new value right into it? I would say no to these two questions, but you can simply add DELR at the end of your...
by dlachieze
Sat Sep 08, 2018 9:05 am
Forum: Usage tips, tricks and problem reports
Topic: Extremum and second derivative
Replies: 2
Views: 221

Re: Extremum and second derivative

It seems to come from the x<>y at step 30. You're recovering the Solver previous estimates and uses as the x solution. As the Free42 Solver implementation is different from the 42s implementation you get a different value. But what you need is what you stored in R00, so as a quick fix just replace s...
by dlachieze
Sat Aug 25, 2018 10:46 am
Forum: DM42
Topic: 3D printed DM42 stand
Replies: 5
Views: 415

Re: 3D printed DM42 stand

Here are some pictures from an old eB auction : https://nsa39.casimages.com/img/2018/08/25/mini_180825125416477172.jpg https://nsa39.casimages.com/img/2018/08/25/mini_180825125415990766.jpg https://nsa39.casimages.com/img/2018/08/25/mini_180825125359257951.jpg https://nsa39.casimages.com/img/2018/08...
by dlachieze
Wed Aug 15, 2018 8:09 am
Forum: Update Announcements
Topic: UPDATE: DMCP-3.9a / DM42-3.9.1 / dm_tool-2.4
Replies: 21
Views: 1795

Re: UPDATE: DMCP-3.9a / DM42-3.9.1 / dm_tool-2.4

Thanks for the update. This time I tested a new way to update my DM42: directly from my Android tablet ! I downloaded DMCP V3.9a and DM42 V3.9.1 on my tablet, connected the DM42 with a USB OTG cable and activated USB Disk in the Setup menu. The DM42 was recognized as a USB key and I copied to it the...