letYourMoneyGrow.com – Serving Retail Investors | J Schreier | Friends Activity https://letyourmoneygrow.com/members/jayes69/activity/friends/ Activity feed for J Schreier's friends. Tue, 03 Nov 2026 16:21:56 +0100 https://buddypress.org/?v= en-GB 30 hourly 2 5a3c45248a9cd85f84f3b4903de15160 letYourMoneyGrow.com started the topic Screen fractional Scaling in Ubuntu and Spyder start from Python in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/screen-fractional-scaling-in-ubuntu-and-spyder-start-from-python/ Mon, 22 Nov 2021 06:44:24 +0100 The default GUI in Ubuntu20 allows to scale all screens but does not allow separate settings per monitor. To circumvent:
sudo apt-get install gdm3
sudo dpkg-reconfigure gdm3
Note: gdm3 is also not perfect but better than nothing.

Starting Spyder from Python (without conda env)
$python
from spyder.app import start
start.main()

]]> 1bc363d759bf52c5aba2b84be4e8e8fe letYourMoneyGrow.com started the topic Installing R4 on Ubuntu - steps after core installation in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/installing-r4-on-ubuntu-steps-after-core-installation/ Sun, 21 Nov 2021 09:57:29 +0100 There are enough good manuals on howto install R4 on Ubuntu20, my favorite one is https://www.digitalocean.com/community/tutorials/how-to-install-r-on-ubuntu-20-04-de (in German).

However, if you then install packages, you will likely get failures due to missing libraries.

So what you definitely have to do is
sudo apt install…[Read more]

]]> 2125cc607c7e1258c0752c36217d5624 letYourMoneyGrow.com started the topic Turbo boost XEON - some useful links in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/turbo-boost-xeon-some-useful-links-2/ Sun, 14 Nov 2021 10:21:36 +0100 general discussion: useful command grep MHz /proc/cpuinfo

https://askubuntu.com/questions/37618/is-turbo-boost-working

enabling turbo mode on SuperMicro X10DRi mainboard

https://www.supermicro.com/support/faqs/faq.cfm?faq=21555
]]> a5dc390bec8ab189a5245047958055b9 letYourMoneyGrow.com started the topic How to confuse R with a stock ticker in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/how-to-confuse-r-with-a-stock-ticker/ Sun, 05 Sep 2021 17:50:58 +0200 First try for Apple (AAPL)
> ohlc = quantmod::getSymbols(“AAPL”, auto.assign = FALSE)
> sd(quantmod::dailyReturn(ohlc))
[1] 0.02033598

So far, so good.
Now try for OPEN (“OPENDOOR TECHNOLOGIES INC”)
> ohlc = quantmod::getSymbols(“OPEN”, auto.assign = FALSE)
> sd(quantmod::dailyReturn(ohlc))
Error in Delt_(getFirst(xx[1]), getLast(xx[ep[2]]), type…[Read more]

]]> f1cfba2a43b19172bd354b16ee360f36 letYourMoneyGrow.com started the topic Setuping Jupyter Notebook for R 4.0 in Conda in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/setuping-jupyter-notebook-for-r-4-0-in-conda/ Fri, 21 May 2021 15:19:00 +0200

In conda env strart R and jupiter as follows
(r4-base) PS C:Usersvasily> RGui (NB RGui or Rscript but not R)
(r4-base) PS C:Usersvasily> jupyter

]]> 184bdd3c1128a97144e56fb4cceac467 letYourMoneyGrow.com started the topic plotting a heatMap with R - package akima in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/plotting-a-heatmap-with-r-package-akima/ Tue, 04 May 2021 20:50:57 +0200
library(akima)
library(fields)
mhu = aggregate(hu$ret, by=list(hu$sGrow1, hu$sGrow2), FUN=mean)
names(mhu)=c("ret", "sGrow1", "sGrow2")
s <- interp(mhu$ret,mhu$sGrow1,mhu$sGrow2)
image.plot(s)

]]> abccfd9e51170f01f2452c77e1cc055a letYourMoneyGrow.com replied to the topic How to use R behind a proxy to get data from Yahoo.Finance and Quandl in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/how-to-use-r-behind-a-proxy-to-get-data-from-yahoo-finance-and-quandl/#post-11078 Wed, 27 Mar 2019 13:11:59 +0100 One can also figure out the proxy configuration as follows:
1) run command prompt (cmd) as administrator
2) netsh winhttp show proxy

]]> 9537439c91890defa44315f7095ea5af letYourMoneyGrow.com replied to the topic Removing dead sources in Debian properly in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/removing-dead-sources-in-debian-properly/#post-10696 Sun, 30 Dec 2018 14:37:32 +0100 And then fix the problem like this

# grep -ri stable /etc
/etc/apt.conf.d/99myDefaultRelease:APT::Default-Release “stable”;

So changing that file to “jessie” would fix it in my case (as I’m on jessie.)

(in my case the filename in /etc/apt.conf.d/ was…[Read more]

]]> ca9adcf22eda0cb00f0a29fe93ab3d1b letYourMoneyGrow.com started the topic Removing dead sources in Debian properly in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/removing-dead-sources-in-debian-properly/ Sun, 30 Dec 2018 13:22:08 +0100 As I tried to install Java on a Server running under Debian Linux, I broke my source list and got http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/jessie/main/binary-amd64/Packages 404 Not Found by attempts to run sudo apt-get update

Deleting the line http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/jessie/main/binary-amd64/ from…[Read more]

]]> f9a302ff7760f8821d21a2e19d76092e letYourMoneyGrow.com started the topic Python-PyCharm: Interactive debugging in console in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/python-pycharm-interactive-debugging-in-console/ Sun, 15 Apr 2018 18:10:43 +0200 Being an long-time R user I got used to debug my R-Scripts in console (for whatever reasons I rarely use breakpoints in R-Studio). Programming in Python I would of course prefer to have both. It is possible e.g. in PyCharm IDE:
0) set a breakpoint, debug your file
1) switch to console window
2) click on command prompt icon
3) execute arbitrary…[Read more]

]]> d56768d29a94aae1b51e927c2013e635 letYourMoneyGrow.com started the topic Remove quotes from text file - replace in Python3 in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/remove-quotes-from-text-file-replace-in-python3/ Mon, 02 Apr 2018 13:49:28 +0200 Sometimes if you create a dataframe with rbind() in R and then save it by write.table() to a text file, all entries (numeric too) will be put in double quotes.
To remove them one can use the following Python3 script, which is especially useful if you have a lot of files.

import os
filePath = "/path/to/dir"
arr = os.listdir(filePath)
for fileName…[Read more]

]]> 4e750436d6d18a4a7b8020f2cddcd444 letYourMoneyGrow.com replied to the topic GoPro (instead of ETF) - bankrupcy risk in the forum JuniorDepot https://letyourmoneygrow.com/forums/topic/gopro-instead-of-etf-bankrupcy-risk/#post-8054 Thu, 08 Mar 2018 19:09:28 +0100 Hello Hans,

thank you for your insightful comment.
Yes, as we explicitly mentioned in our blogpost, we tried to explain Elle (in a suitable manner for a 7y-kid) that GoPro does not earn money (although it does produce good action cameras).

But ok, let a girl have some action :). Finally, even if she makes a loss with this investment, it will be…[Read more]

]]> 08beeadfb79d879002a1f69c4b1e5c41 letYourMoneyGrow.com replied to the topic GoPro (instead of ETF) - bankrupcy risk in the forum JuniorDepot https://letyourmoneygrow.com/forums/topic/gopro-instead-of-etf-bankrupcy-risk/#post-8045 Wed, 07 Mar 2018 08:59:22 +0100 That is really a point!
However, for American stocks they are fortunately small: slightly more than €0.5 per trade.
We announced that we set a stoploss by -20%.
If we, for simplicity, assume that we also take profit by +20%, we need the probability to win to be at least 53% just to stay breakeven. Indeed: 0.53*97.56*1.2 + (1-0.53)*97.56*0.8 = 9…[Read more]

]]> 89b7015dcd423762b7cf078a7bb7eeaf letYourMoneyGrow.com replied to the topic GoPro (instead of ETF) - bankrupcy risk in the forum JuniorDepot https://letyourmoneygrow.com/forums/topic/gopro-instead-of-etf-bankrupcy-risk/#post-8040 Tue, 06 Mar 2018 18:48:02 +0100 Hi Esterkin,
well, yes, we did warn Elle about the bankruptcy risk (or, literally, that “GoPro may spend more money that it earns selling its cameras”). But there is also a chance that the stock price will (more than) double, so we did allow this trade (we would not if it were a definite falling knife).
And even if GoPro goes bankrupt, the…[Read more]

]]> 052f7902cb6cde151f4d99298a7507d9 letYourMoneyGrow.com started the topic Read before posting - LaTeX & source code in the forum Quantitative Methods and Programming https://letyourmoneygrow.com/forums/topic/read-before-posting-latex-source-code/ Sat, 24 Dec 2016 15:02:51 +0100 To write formulas please use LaTeX. Write [latexpage] before writing a formula.
Example
[latexpage]
$W_t = W_0 \exp{rt}$

will result in
[latexpage]
$W_t = W_0 \exp{rt}$

]]> 702be536488435afd080b2b64d542985 letYourMoneyGrow.com and Oleksi Tkachenko are now friends https://letyourmoneygrow.com/activity/p/18/ Sat, 19 Nov 2016 22:04:55 +0100 0