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Mastering Development System & Network

How to improve NFS NAS write speed to drives on my home server

Problem: I get slow write speeds on my NFS NAS. I would like to improve the write speed on my home server. My typical use is: copy a file 1-30gb on my mac laptop to my ubuntu server to one of two places: 1) temporary storage – server system folder (SSD) or 2) permanent storage […]

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Development

Two-Way Repeated Measures ANOVA: Error in lm.fit()… 0 non-na cases (rstatix)

I am trying to run a Two-Way Repeated Measures ANOVA using the R Statix package based on the description from here however I am running into the subject error with my dataset. The data consist of 10 replicate biomass measurements recorded at each of 8 Locations across 5 months (10 reps x 8 locations x […]

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Development

How to minimize the sum of the elements in the final array after performing k number of operation

This question is asked in my interview coding and there were 12 test cases and i am only able to pass 8 of them. minSum(List values, int k) method need to complete. Example : nums = [10,20,7] and k=4 ans answer for this array is 5+5+4=14. Each operation consists of removing element from the array, […]

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Development

GtkScrolledWindow edge overshoot messes up GtkDrawingArea

I have a GtkDrawingArea inside a GtkScrolledWindow. This works fine with GTK2, and with an old version of GTK3 (in Ubuntu 12.04), but with a more recent version of GTK3 (in Ubuntu 18.04), I’m running into a problem: when scrolling hits the edge, part of the drawing area is wiped out by a gray rectangle […]

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Development Python

Parsing a .pdb file in Python and creating a dictionary for specific record types

First, let me start by saying that I’m doing this as a Python exercise and I’m not allowed to use Biopython. I am writing a script that will help me parse any .pdb file generated from a trajectory. I am trying to create a dictionary that would link the chain variable with the resNumber variable. […]

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Development

Query to calculate difference between time only for that particular Date

following are the sample data from table Station ([ID], [Area], [Time_Stamp], [Error], [E_Value]) VALUES (201, ‘hlpw1’, ‘2019-10-02 06:10:00’, ‘Error 1 Value 1’, 186), (202, ‘hlpw1’, ‘2019-10-02 06:30:00’, ‘Error 1 Value 2’, 78), (203, ‘hlpw1’, ‘2019-10-02 06:55:00’, ‘Error 1 Value 3’, 229), (204, ‘hlpw1’, ‘2019-10-02 07:10:00’, ‘Error 1 Value 4’, 175), (205, ‘hlpw1’, ‘2019-10-02 07:40:00’, ‘Error […]

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Development

How to get extremes from already determined groups of peak/valley indexes? [python]

I’m sorry if i’m butchering the question but essentially i have 3 arrays. One array which is the signal data, and an array of peak indexes and an array of valley indexes. The problem however is that sometimes there will be multiple indexes for a peak in a row before there is a valley index. […]

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Development

Combine blocks of different images and produce a new image

I have six photographs. I changed them into block structure. Consider an image of size 200×200. 1. I converted into blocks of 10×10 so now I have 400 blocks in total each of size 10×10. I did this for each image. 2. Then I found the mean value for each block. Again for all images. […]

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Development MySQL

How to improve MySQL stored procedure run for 20 seconds

I have a stored procedure which will run for 20 seconds and make high cpu usage, I found it in the slow query log, this stored procedure always exist and will run for 15 to 30 seconds. I believe this stored procedure caused the high CPU usage. So I am trying to use explain to […]