Making Vector Elements Cumulative

#1 Publicado: 23/4/2018 14:20:34

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In the attachment at the start of Page.5 I (so far) am unable to construct a loop or something that cumulatively adds vector elements down the column. So I am manually doing this for now, any ideas?

I have started additions from the 6th element because first x4 were zero ...but I think you get the idea!

https://imgur.com/7KSBDM8

Secondly in the last page there is a 2D-graph. One can easily read the intersection of two lines however is there any solution to find the intercept of two lines when they aren't functions but are rather data points?

Remembraning.sm (38,42 KiB) descargado 1147 vez(es).

#2 Publicado: 23/4/2018 14:47:10

Jean Giraud

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Wrote
cumulatively adds vector elements

#3 Publicado: 23/4/2018 15:03:49

usamakhan

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no no ...I think I was unable to make you understand. The summation gives one value ...instead I wanted to have a cumulative elements in a vector. The latter thus can be plotted. please revisit the screenshot

#4 Publicado: 23/4/2018 15:37:46

sergio

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sergio

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NDTM Amarasekera 9/8/2019 3:20:00

#5 Publicado: 23/4/2018 15:59:45

Ruben Sidranski

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Sum the vectors and vectorize ...

#6 Publicado: 23/4/2018 16:48:03

Jean Giraud

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Wrote
cumulatively adds vector elements

... as you wish

#7 Publicado: 23/4/2018 16:56:06

Jean Giraud

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Maths Vectorize.sm (9,06 KiB) descargado 1185 vez(es).

#8 Publicado: 23/4/2018 16:56:33

usamakhan

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Thank you PompelmoTell

#9 Publicado: 23/4/2018 17:01:59

usamakhan

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Jean Giraud, why do you add Line in the following code, I mean why not just type them separately or am I missing something?

#10 Publicado: 23/4/2018 17:13:07

Ruben Sidranski

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Jean,
Why did you use Sum(1) with a J loop?

Ioncube,
Just use Sum(4)

#11 Publicado: 23/4/2018 20:27:53

Martin Kraska

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cumsum.sm (3,95 KiB) descargado 1122 vez(es).

Technische Mechanik mit SMath Studio: https://link.springer.com/book/10.1007/978-3-658-50592-9

#12 Publicado: 23/4/2018 21:47:19

Jean Giraud

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Jean Giraud, why do you add Line in the following code, I mean why not just type them separately or am I missing something?

Yes my friend, you are missing best using Smath feature,
1. the line | collects/instructs the project
2. the { collects for plotting
Visit attached Project PR EOS.sm

Here is your plot and cumulative.

Project PR EOS.sm (129,66 KiB) descargado 1170 vez(es).

#13 Publicado: 23/4/2018 22:08:11

usamakhan

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Thanks Jean. I myself am a chemical engineer & Equations of state example is very much appreciated!

mkraska, thanks for helping, but your file is created with a newer version of SMATh & throws error in my current version 0.98.6528

#14 Publicado: 24/4/2018 0:11:37

Jean Giraud

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Wrote
mkraska, thanks for helping, but your file is created with a newer version of SMATh

You are right: Martin latest version throws error in my 6179.
I love Martin code ... Bingo !
The code I provided should work, as it did previous Smath 5346.

#15 Publicado: 24/4/2018 0:28:22

Jean Giraud

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Wrote
You are right: Martin latest version throws error in my 6179.

Try that in your version.

#16 Publicado: 9/8/2019 3:16:20

NDTM Amarasekera

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Wrote

sergio

I tested 3 programs to find the cumulative totals of a large array of 20820 elements.
The method of Sergio was incredibly fast, while other two methods were much slower.
Thanks Sergio.
Forgot to attach DATA file

Rainfal_Data.xlsx (486,31 KiB) descargado 788 vez(es).

Cumulative Sum of a Large Matrix.sm (30,38 KiB) descargado 1163 vez(es).

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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frapuano 9/8/2019 3:43:00

#17 Publicado: 9/8/2019 5:38:20

Alvaro

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Hi Nugegodage. Try this other one.

Cumulative Sum of a Large Matrix.sm (25,32 KiB) descargado 1429 vez(es).

(Notice that mi computer is very slow)
Best regards.
Alvaro

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sergio 9/8/2019 6:43:00, frapuano 9/8/2019 10:47:00, NDTM Amarasekera 9/8/2019 11:43:00

#18 Publicado: 9/8/2019 11:33:32

NDTM Amarasekera

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Hello Alvaro
I get following result in my laptop.
Yours is a very good alternative.
Thanks.

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

#19 Publicado: 9/8/2019 13:31:37

Jean Giraud

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Wrote
cumulative totals of a large array of 20820 elements.

... the word is array
1. Unwrap the array in vector
2. ΣV ... vector sum over the unwrapped array
SS 6179 does not open your document.

#20 Publicado: 9/8/2019 19:12:35

Jean Giraud

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...more and otherwise.

vectSum.sm (15,92 KiB) descargado 1299 vez(es).

Foro SMath

Making Vector Elements Cumulative - Adding Vector Elements down the column - Mensajes