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PhillipClark
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Solved!

Strange output

HP Recommended
HP-50g

Being visually impaired it's rather difficult to search for a solution when I am trying to find out the right keywords to use!

 

The HP-50g calculator is in ALG mode and R='X': however, the same thing happens in RPN mode.  

 

I have decimal numbers stored as variables A and B.   When I try an operation like A+B the answer is displayed as (A B) in brackets (braces) as if the operation is being interpreted as creating an ordered pair but with no separating comma.   For A*B the answer is calculated correctly but still appears in ( ).   For something like A^3+B^3 the answer appears as (A^3 B^3).

 

I assume that somewhere I have a setting that needs to be changed but searching the manuals which I have downloaded does not present an obvious solution.

 

Can someone please advise me?

 

Many thanks in advance.

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BartdB
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971 954 119 186
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Hi,

 

You might like to install a more readable font on the calculator:

http://www.hpcalc.org/details/3329

 

(HPCalc is a great place for resources for the 50g : www.hpcalc.org )

 

Best regards.

-Bart
_________________________________________________________
calculator enthusiast

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BartdB
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Hi,

 

You may have a custom keyboard enabled (perhaps you have uploaded a program recently).

 

Try disabling it by clearing flags -62 and -63

(In MODE, FLAGS, uncheck 62 and 63)

 

Best regards.

-Bart
_________________________________________________________
calculator enthusiast
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PhillipClark
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Thank you for the suggestion Bart.

 

I have not downloaded any programs - or anything - onto the calculator.   I have had it for about a year but I am only just starting to find my way around it.

 

I have just looked at the two flags you mention and they are both unchecked ...........

 

I have just checked (with a magnifying glass!) and the brackets being used are {  } which might be significant.

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BartdB
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Hi,

 

The { } brackets indicate that it is a list. There are times when a + operator adds to a list, but then a list must be one of the inputs in the first place.

 

So without a list present as an input, this should not normally happen.

 

You can try try resetting the calculator:

Press and hold ON then F3, release in reverse order. This is a "soft reset" and does not clear any data.

 

If that does not help try a full reset:

Press and hold ON then F3 then F6, release in reverse order. Select NO when prompted to recover memory (this does not work reliably).

This is a "full reset" and will clear any data in VAR, PORT 0 and PORT 1. (The Flash in PORT 2 is safe as is the SD card if present).

 

Also look if you have the latest Revision of firmware:

Type in VERSION (then ENTER) you should see:

 

"Version HP50-C

 Revision 2.15"

"Copyright HP 2009"

 

The latest firmware revision is 2.15. If that line shows anything else it better to update the calculator.

 

Best regards.

 

-Bart
_________________________________________________________
calculator enthusiast
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BartdB
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Hi,

 

You might like to install a more readable font on the calculator:

http://www.hpcalc.org/details/3329

 

(HPCalc is a great place for resources for the 50g : www.hpcalc.org )

 

Best regards.

-Bart
_________________________________________________________
calculator enthusiast

View solution in original post

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Maké
Level 9
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Hi!, @PhillipClark:

 

1) Download and lear to use for HP50G, with the learning modules, from ... http://www.hpcalc.org/details/5935

2) Download the AUR (Advanced User Reference), for HP50G, from ...

HP 50g / 49g+ / 48gII graphing calculator

3) Too, you can see ... https://support.hp.com/us-en/drivers/selfservice/hp-50g-graphing-calculator/3235173

4) For use FILES with SD, you can see ... SDFILER, from ... http://www.hpcalc.org/details/6524

5) For check the charging, of the battery ... http://www.hpcalc.org/details/6587

6) If needed economize battery, you can use, in RPN ...

1: << 2000h 60 * 'TOFF' STO >>. Now store in HOME (VAR) with 'STARTUP' and STO key. Each time, what you use ON+F3, the calculator is off if you not use, in 60". The time you can change if nedded more time inactive.

Is very convenient store this global variable in port 2 (Flash) or port 3 (SD), if have any.

 

Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
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PhillipClark
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Thank you all for your input.

 

First of all, the prompting about lists made me realise that the values in A and B were somehow stored as single-object lists.   Please don't ask me how that happened because I haven't got the slightest idea!   So I have done a restore and then made sure that the values for A and B are stored correctly as real numbers.   That has solved the problem.   I guess that it's obvious when you know a lot more about the formats of things on the calculator!

 

The operating system of the calculator is the latest version.   I will see about getting a better typeface for the calculator.

 

I will now get on with slowly familiarising myself with the calculator before trying some of my own programs.   So if the universe ends suddenly you will know my first program had a bug in it ...............

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BartdB
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Hi,

 

Good to hear you solved the problem.

 

As for programming, on the 50g programming works best in RPN mode.

 

Good starting points are chapters 1 & 2 of the Advanced User's Reference and the following tutorial

http://www.hpcalc.org/details/1771  (although written for the HP-48 it's applicable to the 50g)

 

Best regards.

 

-Bart
_________________________________________________________
calculator enthusiast
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PhillipClark
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Don't worry, I am using ALG simply to familiarise myself with the calculator.   I bought my first RPL (as it was then) calculator in 1975 and I used the HP-41CX (I think!) calculator for many years - which of course used RPL.

 

Since the problem was the use of { } I think that I must have been evaluating an expression and I used { } instead of ( ) due to my eyesight problems not being able to differentiate between the two very easily.   So the result was calculated as an element in a list, got stored as such and everything flowed from there.

 

I have all of the manuals for the HP-50g downloaded and (surreptitiously!) printed off at work.   Now that I am retired I can sit down and give this calculator the attention that it deserves.

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BartdB
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Hi,

 


@PhillipClark wrote:
...   Now that I am retired I can sit down and give this calculator the attention that it deserves.

 

Yes, I have a bucket list of things to do when I retire (mostly calculator related)  🙂

 

 

Another good forum to have HP calculator related discussions is:

http://www.hpmuseum.org/forum/forum-4.html

 

 

-Bart
_________________________________________________________
calculator enthusiast
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