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Find nth maximum
Find nth maximum in a vector of integer numbers. Return NaN if no such number exists. x = [2 6 4 9 -10 3 1 5 -10]; So ...

4 years ago

Channel

Frizz
stuff

4 years ago

Answered
Reading large amount of entries from a channel starting with some date
I recommend choosing your daterange to read below the limit (say 5000 entries) then you can have a well determined output each t...

4 years ago | 0

Answered
Is MQTT functionality implemented for 3rd party applications?
Theindustrial communication toolbox includes MQTT interfaces. ThingSpeak maintains an MQTT broker that you can interact with to...

4 years ago | 0

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Answered
Clearing channel data not working
The database schedules the delete job as a background task, occasionally you might get behind a flood of other requests. Still,...

4 years ago | 0

Answered
How to add a widget for talkback in the my channel section along with incoming sensor data visualizations?
You can use the plugins app to add javascript that will make a button that sets a channel value. You will be able to use the p...

4 years ago | 0

Answered
Thingspeak MQTT connectivity with LoRa
All the MQTT settings are here at the MQTT API page in the help. You will need an MQTT device and a channel, you can see how to...

4 years ago | 0

Solved

Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

4 years ago

Answered
How to use thingspeak in online simulator of arduino like tinkercad and wokwi?
This https://www.mathworks.com/help/thingspeak/prototyping-with-sonar-proximity-sensor.html example of a proximity monitor shows...

4 years ago | 1

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Cannot create a new channel.
We worked with Neil and got him going again. He had an expired commercial trial. They can be extended or restarted but you nee...

4 years ago | 0

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Thingspeak unit - 24 messages every same minute
If each device has its own channel, you can upload all messages in the same second. If you have a home or student unit, you are...

4 years ago | 0

Answered
How to write to thingspeak channel from thinghttp?
If your ThingHTTP is interacting with an external website, you can rewrite it in MATLAB analysis using webread or webwrite. The...

4 years ago | 0

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Answered
Access to Image Channels with academic licence
I suspect you mean that you have a campus wide license or academic MATLAB license. ThingSpeak paid licenses are in addition to ...

4 years ago | 1

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Is Arduino Ethernet Shield R3 supported?
Can you use the thingSpeakRead and thingSpeakWrite blocks?

4 years ago | 0

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Is multifield update counted as one message or multiple?
See the licensing FAQ, question 4. And the answer to your question is one.

4 years ago | 0

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How can i add Econometrics Toolbox to thingspeak
You will need to use the same MathWorks account for your ThingSpeak work as for the desktop. ThingSpeak will take care of looki...

4 years ago | 0

Answered
Thingspeak widget customization when posting the widget onto an external website using iframe
You cannot use the ThingSpeak gauge without the iframe. You may be able to embed a google gauge on your website direcly, and re...

4 years ago | 0

Solved

Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

4 years ago

Answered
ESP NOW provided sensor datas to ESP32 and Matlab serial communication
You can only update every 15 seconds with a free license, but you can use the bulk update endpoint to get a higher density of po...

4 years ago | 1

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Answered
ESP NOW provided sensor datas to ESP32 and Matlab serial communication
Are you able to run a WiFi client at the same time as the ESP NOW? You could connect to a WiFi network to send the values to T...

4 years ago | 0

Solved

What is the distance from point P(x,y) to the line Ax + By + C = 0?
Given a point, P(x,y), find the distance from this point to a linear line. INPUTS: x, y, A, B, C OUTPUTS: d, the distance ...

4 years ago

Solved

Sum of series II
What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?

4 years ago

Solved

Calendar Matrix
Return a calendar matrix for the given values of month and year. Assume that Sunday is the first day of the week. The resulting ...

4 years ago

Solved

Approximation of Pi
Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given number of...

4 years ago

Solved

Sum of series I
What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?

4 years ago

Answered
Dynamic data display in ThingSpeak dashboard
There is a plugin app in ThingSpeak that you could use to crate a javascript app with a dropdown menu (I suspect, though I haven...

4 years ago | 0

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Solved

Predict Cricket Stridulation Rate from Air Temperature
Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

4 years ago

Solved

Find Air Temperature from Cricket Stridulation Rate
Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

4 years ago

Answered
Project Image on a Mesh
You can use the same arguments used to create the mesh to create the warped surface, then plot the mesh and hold the plot while ...

4 years ago | 0

Answered
My ThingSpeak doesn't receive particular data regularly
Now I see the issue. You should send one update to ThingSpeak instead of building them seperately for each field. You care act...

4 years ago | 0

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