Community Profile

photo

Douglas Leaffer


Last seen: 2 meses hace Con actividad desde 2021

Environmental Engineer focusing on engineered solutions to measure, monitor and mitigate adverse health impacts from noise and air pollution. PhD, Tufts University (MA) in Civil & Environmental Engineering.

Estadísticas

  • Thankful Level 3
  • First Answer
  • First Review

Ver insignias

Content Feed

Ver por

Pregunta


heatmap help - how to display grouped data across 3 levels (LO, MED, HI) ?
How can I show 3 levels in a heatmap (LO MED, HI) and not just two (FALSE, TRUE for example) across n=4 GROUPS for a single outc...

3 meses hace | 2 respuestas | 0

2

respuestas

Respondida
Normalized Wind Rose Plot help
Hello, it seems the plots generated from these suggested answers are not what I need. I need a normalized [0 1] wind rose of U...

3 meses hace | 0

Pregunta


Reformat and Merge Date and Time columns
Hello. Could use some help merging the Date and Time columns in the attached data file. Date (Column 1) is a DateTime vector dd-...

7 meses hace | 2 respuestas | 1

2

respuestas

Pregunta


Help with student grades categorization for ANOVA-n
Hello. I need some help formatting a table (attached) of student grades for an ANOVA-n analysis. I want to perform the ANOVA-n w...

9 meses hace | 1 respuesta | 0

1

respuesta

Pregunta


Normalized Wind Rose Plot help
I am trying to generate a normalized (to the max) wind rose plot of air pollutant concentration (UFP) by wind direction. See pho...

9 meses hace | 2 respuestas | 0

2

respuestas

Pregunta


vertcat errors - need a 'workaround' solution
Please suggest a 'workaround' or alternate solution for the following error (code and data tables attached) "An error occurred ...

10 meses hace | 1 respuesta | 0

1

respuesta

Pregunta


Need advice for coding dummyvar vectors - Regression
How should I properly code dummvar vectors for use in regression analysis in MATLAB? I have attached a sample table of data (.xl...

10 meses hace | 1 respuesta | 0

1

respuesta

Pregunta


How do I add column headers (variable names) to a dummyvar table?
I could use some help adding column headers (variable names) to a dummyvar table? My code is attached. The table (tbl) once conv...

10 meses hace | 0 respuestas | 0

0

respuestas

Pregunta


How to add seconds to a HH:mm DateTime array ?
How do I add seconds as: ss = 00 to a datetime array of the form MM/dd/YYYY HH:mm: 04/15/2016 01:00 as an example

10 meses hace | 3 respuestas | 0

3

respuestas

Pregunta


how to create wind direction categoricals
Hello. I m trying to create categoricals from wind directions (0 - 359 degrees) for 4 values: 1 = airport; 2 = bus_sta; 3= road;...

alrededor de 1 año hace | 1 respuesta | 0

1

respuesta

Pregunta


How do I replace (or remove) <undefined> with NaN in a categorical array ?
How do I replace (or remove) <undefined> with NaN in a categorical array ? .dat file excerpt is attached. Thanks for any help ! ...

más de 1 año hace | 1 respuesta | 0

1

respuesta

Pregunta


How do I convert tall array duration time vector to HH:mm:ss for merging with tall array datetime vector ?
Need some help with this. I have a tall array date vector 'yyyy-MM-dd' of datetime format, and a tall array time vector 'HH:mm:s...

alrededor de 2 años hace | 2 respuestas | 0

2

respuestas

Respondida
Hey there, I am trying to write a code for 2D-Mohr's circle and i need to generate a circle for x value of Sx, radius(r) of T.
ADD the following function call to your script: circle((S1+S2)/2, 0, Tm) % function call Then create a new function and save t...

casi 3 años hace | 0