## Search found 42 matches

- Sat Oct 09, 2021 5:34 pm
- Forum: User Software Contributions
- Topic: Encryption and decryption of text
- Replies:
**2** - Views:
**352**

### Re: Encryption and decryption of text

New version that allows do encrypt and decrypt not just one character at a time but up to 24. Application: At the beginning you are asked for the starting value of the random number generator: SEED? Take any number between 0 and 1. The same number has to be used for encryption and decryption. Then y...

- Sat Oct 09, 2021 5:26 pm
- Forum: User Software Contributions
- Topic: Encryption and decryption of text
- Replies:
**2** - Views:
**352**

- Fri Sep 10, 2021 6:57 pm
- Forum: Discuss!
- Topic: Standard error of forecast
- Replies:
**10** - Views:
**910**

### Re: Standard error of forecast (error propagation in fitting?)

Hi Walter, I fear I do not understand you well. The formula I gave is not the standard value of the sample values but for a value x0 that may be a sample value or may not be. I do not know what t is and 2,0.683 Is a typo by sure but even if I read it as 2 I cannot see why this multplication makes se...

- Sat Sep 04, 2021 12:18 pm
- Forum: Discuss!
- Topic: Standard error of forecast
- Replies:
**10** - Views:
**910**

### Re: Standard error of forecast (error propagation in fitting?)

Hi Walter, s(e) should not be replaced by s(y). In the wikipedia article sigma is defined only implicitly. Under the headline "t-test" you see it is assumed that the error term is normally distributed with mean 0 and variance sigma^2. From this it is clear that the sigma used later is the ...

- Fri Sep 03, 2021 7:52 am
- Forum: Discuss!
- Topic: Standard error of forecast
- Replies:
**10** - Views:
**910**

### Re: Standard error of forecast (error propagation in fitting?)

Hi Pierre, your formula delivers the standard error of all y-values of the regression, one result for all y-values together (see the example in Excel). The formula I posted delivers the standard error for one single value which may be in the data set of the regression analysis but may as well be an ...

- Thu Sep 02, 2021 8:24 pm
- Forum: Discuss!
- Topic: Standard error of forecast
- Replies:
**10** - Views:
**910**

### Re: Standard error of forecast (error propagation in fitting?)

Hi Walter, the formula for the variance of a forecasting value f is: S(f)^2 = S(e)^2 * (1+(1/N) + (x0-mean(x))^2/sum(xi-mean(x))^2) Whereas: N = number of observations mean(x) = arithmetic mean of x x0 = value of x for which you want a forecast Se^2 = sum(yi-(a+b*xi))^2/(N-2) a is the constant, b th...

- Sat Aug 28, 2021 3:46 pm
- Forum: Software Library
- Topic: Crypting and decrypting text messages
- Replies:
**0** - Views:
**199**

### Crypting and decrypting text messages

With this program you can crypt and decrypt text messages. This is the DM 42 version of a DM 41 X program that can be found here: https://forum.swissmicros.com/viewtopic.php?f=30&t=3095 Application: At the beginning you are asked for the starting value of the random number generator: SEED? Take ...

- Sat Aug 28, 2021 10:46 am
- Forum: User Software Contributions
- Topic: Encryption and decryption of text
- Replies:
**2** - Views:
**352**

### Encryption and decryption of text

This program allows to encrypt and decrypt messages. Application: At the beginning you are asked for the starting value of the random number generator: SEED? Take any number between 0 and 1. The same number has to be used for encryption and decryption. Then you are asked whether you want to encrypt ...

- Mon Aug 09, 2021 9:51 am
- Forum: Usage tips, tricks and problem reports
- Topic: Problem with input of numeric label
- Replies:
**3** - Views:
**283**

### Re: Problem with input of numeric label

Thank you very much for your answer, it worked.

And sorry that I did not realize that it was already discussed. I did not know that it was discussed there.

Best

Raimund

And sorry that I did not realize that it was already discussed. I did not know that it was discussed there.

Best

Raimund

- Mon Aug 09, 2021 8:09 am
- Forum: Usage tips, tricks and problem reports
- Topic: Problem with input of numeric label
- Replies:
**3** - Views:
**283**

### Problem with input of numeric label

Hi, whenever I want to input a numeric label in my DM 42 (by pressing f PGM.FCN - LBL or XEQ f ALPHA LBL) the Alpha-Mode is switched on. In the lowest line of the screen the Alphabet is shown above the 6 top line keys and the sign |A| is in the first line of the screen. I am not able to switch off t...