Programming a Line

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Summary:

Convert List info from Spreadsheet to drawing lines

Programming a Line

dik99 21 Jul 2017 20:24

I'm using a TI Nspire CX CAS and am working through programming; currently trying to implement a FEM Frame analysis program.

Is there a manner that I can take a set of data points in the form Pn(x,y,z)…from a spreadsheet application and draw a line from Pn(x,y,z) to Pn+1(x,y,z) from the spreadsheet data?

I'm having difficulty finding a decent programming manual for the TI Nspire; does one exist? There seems to be a real lack of methods to enter data.

Fortunately the handheld spreadsheets work very well for data entry for my frame program data, so far.

Thanks in advance, Dik

Re: Programming a Line

Myles_Zadok 21 Jul 2017 20:43

Well, dik99, you are correct that there are few Nspire manuals out there. One of these days, I'm going to get myself an Nspire CX CAS, and create walk-throughs for Nspire Basic. Right now, the best manual I can find is this by Texas Instruments themselves:

TI Nspire Programming

Re: Programming a Line

Battlesquid 21 Jul 2017 21:20

Yeah, the thing is there is little support for Nspires, mostly because of their poor ability for I/O commands. Hopefully, someone can bust out a manual for Nspire (Go Myles!).

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Re: Programming a Line

Myles_Zadok 21 Jul 2017 22:07

I did as much preparation for the Nspire Home Page style as I could, so the Nspire pages would be prepared for when I get around to making the manual. In the meantime, I'm going to finish learning CSS (which I just started learning), so I'll be able to handle any page styling that I might want to do.

Last edited on 21 Jul 2017 22:11 by Myles_Zadok Show more

Re: Programming a Line

Battlesquid 22 Jul 2017 02:04

Yep, I noticed, and you did a great job! If you want to make a logo to match the theme, try LunaPic, Photoshop, or Paint.NET (there is a better tool online, but I've forgotten the name. I'll be looking for it though).

EDIT: I found the tool, it's called miniPaint. Awesome tool for color replacement and more.

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Last edited on 04 Aug 2017 23:32 by Battlesquid Show more

Re: Programming a Line

Myles_Zadok 22 Jul 2017 02:15

I have no idea how to use any of those tools (I looked into them). Apparently, I'm a programmer, not a designer. So if someone could make a matching logo and apply the Nspire home page CSS design to the rest of the Nspire pages, I'd really appreciate it.

Re: Programming a Line

dik99 21 Jul 2017 22:09

I've had mine for several months and it's an incredible handheld (it's almost too powerful)… but, the ability to do simple, obvious things for programming does not appear to be there… a real waste for such a calculator (I prefer calculator to handheld).

The programming information using spreadsheets omits a significant item… you have to provide an individual name for the columns… you cannot duplicate a name or identify the spreadsheet you are taking the data from. I have not been able to program a 'line' using beginning and end coordinates. I cannot clear the screen prior to adding other data. There does not appear to be a 'Select Case' type of function. There is little or no information about using multi-dimensional arrays… the language seems to treat the data as List variables.

Dik

Re: Programming a Line

Myles_Zadok 21 Jul 2017 22:14

Yeah, I've heard doing any kind of graphics (even lines) is pretty difficult on Nspires. Hopefully I'll be able to come up with something when I get around to making a manual.

Re: Programming a Line

dik99 31 Jul 2017 04:09

I posted a query to TI Support regarding a line function and a clear screen function and was referenced to several areas that didn't have answers. Tech support was really less than useful. If it cannot be done, I'd prefer to know rather than chase the chicken around the bush…

Dik

Re: Programming a Line

Myles_Zadok 31 Jul 2017 17:51

The problem is, nobody really knows if it can be done or not. That's why you keep getting referred to places and people that might know. So, I think the best answer I can give you right now is that it cannot be done, or at least, nobody has figure out how to do it yet.

Re: Programming a Line

Battlesquid 02 Aug 2017 04:55

Try asking some people on Cemetech. There should be somebody who know how to work an Nspire there :)

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Re: Programming a String

dik99 23 Jul 2017 01:22

I'm having difficulty having public library connections. I've saved it as a public library and it is not visible in the catalogue and have saved it as a private library and it's visible there. I've tried pasting the private library function and it still doesn't read it as a function. FillStr() works like a charm…

©fldwidth – width of field for string insertion
©strvar – string variable to be centered
Define LivPub CenterStr(fldwidth, strvar)=
Func
Local ls,lb,le,strng
strng:=""
ls:=fldwidth-dim(strvar)
lb:=int(((fldwidth-ls)/(2)))
le:=fldwidth-ls-lb
Disp ls,lb,le,strng
strng:=fillstr(" ",lb)&strvar&fillstr(" ",le) --- CenterStr()function does not see FillStr()
EndFunc

©strvar – character(s) to be inserted in returned string
©numchrs – total number of characters in string
Define LivPub FillStr(strvar,numchrs)=
Func
Local cntr,strng
strng:=""

For cntr,1,numchrs
strng:=strng&strvar
EndFor
EndFunc

Dik

Adding a Function to the Catelogue

dik99 31 Jul 2017 04:04

I'm running the Computer Link Software and the Student Software packages for the TI Nspire CX CAS. From either the computer file browser or the Hand Held (HH) file browser I have written functions for string manipulation and they are, for example, Define LibPub Str_Left (fldwidth, strvar, strleft) = Func <Code> EndFunc. The functions have been saved and the libraries have been updated via the software.

The functions are saved in the catalogue under Item 6 which doesn't have a name, in a sub-directory with the function name 'Str_Left'. If I load the function from the catalogue, it comes up with the function Str_Left/Str_Left. The function name is not bold to reflect that it's a function.

Can anyone advise me how to link the function to the program?

Is there an easy way to import *.txt files into the TI Basic or to export *.txt files from TI Basic on this HH? It's a fabulous calculator but really terrible for programming with; it's terrible that it has been crippled.

Is there a non-proportional font that can be loaded?

Dik