Making Vector Elements Cumulative

#1 Posted: 4/23/2018 2:20:34 PM

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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 KiB) downloaded 42 time(s).

#2 Posted: 4/23/2018 2:47:10 PM

Jean Giraud

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cumulatively adds vector elements

#3 Posted: 4/23/2018 3:03:49 PM

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 Posted: 4/23/2018 3:37:46 PM

sergio

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[albumimg]1481[/albumimg]
sergio

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

#5 Posted: 4/23/2018 3:59:45 PM

Ruben Sidranski

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Sum the vectors and vectorize ...

#6 Posted: 4/23/2018 4:48:03 PM

Jean Giraud

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cumulatively adds vector elements

... as you wish

#7 Posted: 4/23/2018 4:56:06 PM

Jean Giraud

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Maths Vectorize.sm (9 KiB) downloaded 74 time(s).

#8 Posted: 4/23/2018 4:56:33 PM

usamakhan

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Thank you PompelmoTell

#9 Posted: 4/23/2018 5:01:59 PM

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 Posted: 4/23/2018 5:13:07 PM

Ruben Sidranski

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

Ioncube,
Just use Sum(4)

#11 Posted: 4/23/2018 8:27:53 PM

Martin Kraska

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cumsum.sm (3 KiB) downloaded 52 time(s).

Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx

#12 Posted: 4/23/2018 9:47:19 PM

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 KiB) downloaded 50 time(s).

#13 Posted: 4/23/2018 10:08:11 PM

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 Posted: 4/24/2018 12:11:37 AM

Jean Giraud

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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 Posted: 4/24/2018 12:28:22 AM

Jean Giraud

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

Try that in your version.

#16 Posted: 8/9/2019 3:16:20 AM

NDTM Amarasekera

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[albumimg]1481[/albumimg]
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 KiB) downloaded 32 time(s).

Cumulative Sum of a Large Matrix.sm (30 KiB) downloaded 47 time(s).

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

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frapuano 8/9/2019 3:43:00 AM

#17 Posted: 8/9/2019 5:38:20 AM

Alvaro Diaz Falconi

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Hi Nugegodage. Try this other one.

Cumulative Sum of a Large Matrix.sm (25 KiB) downloaded 39 time(s).

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

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

#18 Posted: 8/9/2019 11:33:32 AM

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 Posted: 8/9/2019 1:31:37 PM

Jean Giraud

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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 Posted: 8/9/2019 7:12:35 PM

Jean Giraud

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...more and otherwise.

vectSum.sm (15 KiB) downloaded 35 time(s).

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