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# Christopher Stapels

### MathWorks

33 total contributions since 2017

ThingSpeak Documentation Writer
and LCH enthusiast

#### Christopher Stapels's Badges

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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...

2 months 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...

7 months ago | 0

| accepted

Channel

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

7 months ago

Channel

WorkTime

8 months ago

Channel

Soil Monitor Data Summary
Time aligned data

1 year ago

Channel

Daily Stock Data
Google Stock values compiled daily.

1 year ago

Channel

Home Temp Time

1 year 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...

1 year 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...

1 year 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...

1 year ago | 0

Channel

MyCar Count Channel

1 year 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...

1 year ago | 0

| accepted

Channel

Lights1
kitchen lights control

1 year 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 ...

1 year 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...

1 year 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...

1 year ago | 0

Channel

HomeTemp1

1 year ago

Channel

Community Scores

1 year 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...

1 year 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...

1 year ago

Solved

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

1 year ago

Channel

1 year ago

Channel

IPT Results

1 year ago

Channel

Weather Text

1 year ago

Channel

Office Temperature

1 year ago

Channel

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

2 years ago

Channel

Soil Monitor
Plant in my officre

2 years ago

Channel

import test

2 years ago

Channel

Time

2 years ago