Community Profile

# Christopher Stapels

### MathWorks

33 total contributions since 2017

ThingSpeak Documentation Writer
and LCH enthusiast

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Guru Meditation exception during publishing values to thing speak
You should also be able to update the value of a ThingSpeak field using the REST API. The MQTT connection is intended to be ve...

약 1달 ago | 0

matlab and thingspeak manipulate data before plotting
I would recommend setting up a new channel. Then you can set a react to call a MATLAB analysis to write the data to the new cha...

6달 ago | 0

| accepted

Channel

Battery Voltage
two six volt bettery packs in paralell in the basement

6달 ago

Channel

WorkTime

7달 ago

Channel

Soil Monitor Data Summary
Time aligned data

12달 ago

Channel

Daily Stock Data

12달 ago

Channel

Home Temp Time

약 1년 ago

Solved

A Simple Tide Gauge with MATLAB
*&#8767 &#8767 &#8767 &#8767 &#8767 &#8767 &#8767 &#8767* You are standing in a few inches of sea water on a beach. You a...

약 1년 ago

Solved

5 Prime Numbers
Your function will be given lower and upper integer bounds. Your task is to return a vector containing the first five prime numb...

약 1년 ago

I want to calculate the derivative of a channel. Can you suggest the best way to do so.
One way would be to use an instance of the React App to test if field 2 has a value in it, perhaps "if field2 < 0". Then have t...

약 1년 ago | 0

Channel

MyCar Count Channel

약 1년 ago

Thingspeakwrite error when using string array
When you write string data to ThingSpeak, it generally wants to have a cell array. You should not usually need to do the Strin...

1년 이상 ago | 0

| accepted

Channel

Lights1
kitchen lights control

1년 이상 ago

Solved

Make an awesome ramp for a tiny motorcycle stuntman
Okay, given a vector, say v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 3 6 9 11 0; 6 9 ...

1년 이상 ago

Solved

Back to basics 21 - Matrix replicating
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

1년 이상 ago

No more plot although no errors
As of December 14, your channel has recent values in it. I think the NaN values between real values are making the plot scale u...

1년 이상 ago | 0

Channel

HomeTemp1

1년 이상 ago

Channel

Community Scores

1년 이상 ago

Solved

Pernicious Anniversary Problem
Since Cody is 5 years old, it's pernicious. A <http://rosettacode.org/wiki/Pernicious_numbers Pernicious number> is an integer w...

1년 이상 ago

Solved

Energy of a photon
*&#9883 &#9762 &#9883 &#9762 &#9883 &#9762 &#9883* Given the frequency F of a photon in giga hertz. Find energy E of this...

1년 이상 ago

Solved

How to subtract?
*&plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn* * Imagine you need to subtract one...

1년 이상 ago

Channel

1년 이상 ago

Channel

IPT Results

1년 이상 ago

Channel

Weather Text

1년 이상 ago

Channel

Office Temperature

1년 이상 ago

Channel

Stock Value Data
Prices for Google Stock every 5 minutes during the times when the market is open

2년 이하 ago

Channel

Soil Monitor
Plant in my officre

2년 이하 ago

Channel

import test

2년 이하 ago

Channel

Time

2년 이하 ago