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'nanmean' requires one of the following: Financial Toolbox Statistics and Machine Learning Toolbox

Error in Custom (no starter code) 1 (line 15) avghumidity= nanmean(humidity);

how to remove this error?

Via a particle photon and webhook, i am sending data to THINGSPEAK. The channel indicates entries e.g. 1239 entries but the graphs are empty. Can anyone help me to fix this? Thanks

Hi, I have an AIOT project on vertical farming project. Currently, I am using Thingspeak to store sensor values. I am planning to do the followings:

1) do an analysis on the data collected for each sensors on their max, min and median (50%) to determine that the sensor value is currently ok for the plants. I am aware that Thingspeak is able to calculate these and I am learning about this now.

2) I would like to predict the sensor values collected ( eg temperature/humidity etc). I feel that this is a cool feature to have in my project but I am not sure how do I go about this. For experts in Thingspeak, do you think this is a must have for an internship project on vertical farming and how do I apply this in my project? I am not sure if this is manageable for a single student to do this and I really appreciate it if anyone would guide me along.

Hallo all Did anyone tried to send data from siemens wincc scada to a chanell. From me experiance wincc VBA works but from wincc VBS no way? Any comment or experiance to share

Our ThingSpeak channels stopped updating their dashboards at 20:08 BST. We can see other public channels aren't updating too from this time.

Our code for writing to ThingSpeak is returning a 202 success, indicating it is successful, suggesting that data is still being written.

Are any ThingSpeak services down?

When I log in to my account the display just constantly cycles/refreshes about every 2 seconds, with a message at the top saying "authenticating". So I can't view anything.

I can't edit charts with the pencil icon, tried different sort of webbrowsers in windows 10 and also different pc's. When i try it on my android phone it does work perfectly with the same wifi connection? When i inspect the pencil object in the chrome browser it shows some warnings, see picture

Hello, I want to read the instant GPS data from Thingspeak Cloud and show it on the folium map, but I could not do the integration. Do you have Any suggestions?

Four (of many) new features for Apps in MATLAB R2021a

These four new features are the solutions to many inquiries in the Answers forum that continue to receive hundreds of views per month long after they were asked.

Table of Contents

• Keyboard Shortcuts for UI Components
• Programmatically scroll UITables
• Figure always on top
• UI hyperlink component
• Demo app: Keyboard shortcut challenge

Keyboard Shortcuts for UI Components

Keyboard shortcuts can now change the focus and make contiguous and non-contiguous selections in ListBox, Table, DatePicker, and ColorPicker menus created in uifigures. The table below summarizes the shortcuts made available in R2021a ( release notes ).

Reminder: in MATLAB R2020b and later you can change the tab order of objects in an app by changing their stack order in AppDesigner using the Reorder tool in the drop-down menu or by right-clicking the component and selecting Reorder from the menu (see R2020b release notes and a screenshot in the Answers forum ).

Programmatically scroll UITables

The scroll function was added in R2016a but as of R2021a it can be used with uitables to programmatically scroll to the top, bottom, left, or right of a table or to a specific row, column or cell ( release notes ). Combined with a uistyle (R2019b) you can scroll to and highlight any part of the uitable.

Syntax examples:

• scroll(uit,vlocation) where vlocation is 'top'-'bottom'
• scroll(uit,hlocation) where hlocation is 'left'-'right'
• scroll(uit,target,targetIndex) where target is 'row'-'column'-'cell' and targetIndex is a row or column number or a 1x2 cell location.

Figure always on top

Figures created with uifigure now have an additional WindowStyle property: 'alwaysontop' ( release notes ). Figures with this setting will stay on top of other windows but unlike the modal option, other windows are still accessible.

See the WindowStyle property description for tips on setting and changing this property.

To toggle the AlwaysOnTop state of your app using a checkbox, state button, or another UI component, follow this callback function template,

function alwaysOnTopCheckBoxValueChanged(app, event)
    value = app.alwaysOnTopCheckBox.Value;
    if value
        app.UIFigure.WindowStyle = 'alwaysontop';
    else
        app.UIFigure.WindowStyle = 'normal';
    end
end

UI hyperlink component

Use the uihyperlink function or the UI hyperlink component in App Designer or a uifigure to add and configure a clickable link ( release notes ). The hyperlink can be assigned to a figure, panel object, tab object, ButtonGroup, or GridLayout object when created in a uifigure. In addition to setting the text and URL, there are lots of properties to control the text format including the VisitedColor property that controls the color of the text after the link is clicked and an optional user-defined HyperlinkClickedFcn function that is evoked when the link is clicked.

Demo app: Keyboard shortcut challenge

The attached zip file contains an app, keyboardShortcutsDemo_R2021a.mlapp , that demonstrates these 4 features. The app displays the extent of arctic sea ice from 1979 to 2016 during the months when extent typically maximizes and minimizes.

Mouseless challenge: After opening the app, without using your mouse, try the following.

• Select a month (September or March) and any number of years from the list boxes
• Navigate through the Date Picker and select a date within the range or your selected years (disabled when only 1 year is selected).
• Navigate to the always-on-top checkbox to pin the app to the top of other windows.
• Navigate to the text box and enter a year that appears in the uitable to go to that row in the uitable (disabled when only 1 year is selected).
• Navigate to the URL and press Enter to open the website containing the raw data.

Download the attached zip file, FourNewAppFeatures_R2021a.zip, for a Live script copy of this thread and an app that demonstrates each feature.

Hello, was hoping to share my Public Sharing page with others without the need for them to log in. In Chrome, it works only if I open a page in Incognito Mode, then I can view without logging in.

Also, from FB Messenger, I can click the link and it will open a page on my Iphone without needing login, but some others, including me in Chrome click the link and it says I need to log in first.

Any ideas how to fix that?

Hi!Yersterday i finally connected my rpi 3B+ with sensehat via Thingspeak.All worked just fine but today when i started the stream(run-prod.sh) number of entries appeared stuck on 0.I created a new channel but the problem still persist.If someone could help much obliged.P.S is a project for faculty.Any help would be helpfull.

Regards, Andrei.

Hi, I am currently trying to use my FPGA to retrieve data from my Thingspeak LED status graph. Previously, I tried this with my Mode NCU. As I gave "1" to one of the fields in my LED status channel, my LED will light up. It was successfully done. Now, I want to try with FPGA (To be specific, it is Digilent's Zybo Z720 board).

I have learnt that I need to use Pmod ESP32 to achieve this function. Previously, I used the AT commands to send my data from sensor to Thingspeak channel.

Here is the code: void receiveData(XTime time){ XTime tEnd, tCur; u8 recv_buffer=0; u32 num_received=0;

XTime_GetTime(&tCur); tEnd = tCur + (time * COUNTS_PER_SECOND); do { num_received = ESP32_Recv(&ESP32, &recv_buffer,1); if(num_received >0){ num_received = ESP32_Recv(&ESP32, &recv_buffer,1); xil_printf("%c", recv_buffer); } if(tCur == tCur + COUNTS_PER_SECOND){ countdown = countdown -1; } else XTime_GetTime(&tCur); } while (tCur < tEnd);

}

void setWifiMode(void){ u8 tx[]="AT+CWMODE=3\r\n"; u32 num = strlen((char *) tx); xil_printf((char *) tx); ESP32_SendBuffer(&ESP32, tx, num); usleep(100); receiveData(3); }

void connectWifi(void){ u8 tx[] = "AT+CWJAP=\"________\",\"_____________\"\r\n"; u32 num = strlen((char *) tx); xil_printf((char *) tx); ESP32_SendBuffer(&ESP32, tx, num); usleep(100); receiveData(30); }

void establishConnection(void){ u8 tx[] = "AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",80\r\n"; u32 num = strlen((char *) tx); xil_printf((char *) tx); ESP32_SendBuffer(&ESP32, tx, num); receiveData(10); }

void cipsend(float temp, u16 co2, u8 light, float humidity){ u8 command[150]; u8 finalcmd[50]; //field1 Ph field2 Temp field3 co2 field4 humidity field5 light sprintf((char*)command, "GET http://api.thingspeak.com/update?api_key=____________&field1=0&field2=%d.%02d&field3=%d&field4=%d.%02d&field5=%d\r\n" ,(int) temp_degc,((int) (temp_degc * 100)) % 100,co2,(int) hum_perrh,((int) (hum_perrh * 100)) % 100,light); u32 length = strlen((char*)command); sprintf((char*)finalcmd, "AT+CIPSEND=%d\r\n", (int)length); u32 cmdlength =strlen((char*)finalcmd); xil_printf("Length %d\r\n", length); xil_printf((char *)finalcmd); ESP32_SendBuffer(&ESP32, finalcmd, cmdlength); sleep(1); xil_printf((char *)command); ESP32_SendBuffer(&ESP32, command, length); receiveData(4); }

Now, I am a bit confusing with the reverse part (receiving data from Thingspeak). Should I use the same AT command like AT+CIPSEND, or change the AT command. Or should I need to do something like Json Parsing.

I appreciate your favourable response. Thanks Luke

Climate Data Toolbox was developed by Chad Greene, a postdoctoral research fellow at NASA Jet Propulsion Laboratory, and Kelly Kearney, a research scientist at University of Washington. The Climate Data Toolbox is freely downloadable from File Exchange and has been downloaded over 5,000 times since 2019.

The toolbox was inspired by one big idea: There are a common set of tasks related to data processing, analysis and visualization that Geoscience researchers and students working with climate data typically perform. Greene and coauthors make the case in their paper published in Geochemistry, Geophysics, Geosystems that having everyone who is tackling climate analysis separately recoding these same tasks is not a good use of time, for the individual or the collective, as it takes away from other more innovative climate work. Better to have a set of reusable, publicly shared functions for those repetitive tasks.

Recently, Lisa Kempler published an example of how to look at the change in temperature of the Pacific Ocean over time using MATLAB and the Climate Data Toolbox.

Try the example here by loading up MATLAB, installing the Climate Data Toolbox, and following along the tutorial.

Hello, I am a beginner for IoT. I found ThingSpeak is an awesome platform for IoT. I am having a problem in the API write request. Whenever we send API request for writing a channel feed, the URL return 0, if is is failure and return a non zero value for success. Is there any way to capture this data? Also, is there any way to block the return of the value from this API.

Thanks...

Hi, currently I am working on a dashboard that uses Thingspeak and Mendix. I am using a GaugeChart in Mendix and it receives data from Thingspeak. However, I have to refresh the page manually to see the new sensor values. One of my answers I got is that it is the Thingspeak that is not sending the data properly.

Long story short, he said that I have to expose API from Mendix which will produce a URL link (similar to Thingspeak API URL link) and in Thingspeak, I have to put that URL into Thingspeak. I have been looking around in Thingspeak and the closest thing that allows me to put an external URL is at ThingHTTP. However, we did not make use of ThingHTTP when communicating with our hardware and for Mendix, I only use Call rest API to receive data. Please help!

MATLAB EXPO 2021 is May 4-5, 2021!

MATLAB EXPO is open to everyone:

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Special Event: Women in Tech Ignite Session

Women in Tech Ignite is a networking event where the MATLAB community can meet and be inspired by a diverse group of women engineers and scientists and hear about the innovative ways they use MathWorks products. Attendees of all genders are welcome.

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Hello! I use 3 sensors and send the data via esp8266 to thingspeak. I want to take the data from thingspeak and send it to an html page created by me but I haven't worked with thingspeak so far and I don't know how I should proceed. Is there anyone who can help me? An example code that takes data from thingspeak would help me a lot.

We introduced Difficulty Rating functionality during 2020 Cody Contest. Our Cody players have provided difficulty rating for most of the problems. Now we are displaying the ratings in the Problems list view.

Sorting and Filtering to follow...

I am a student with 2 others in my project. we connected 3 RPi sending temp and pressure to my Project channel using fields 1,2 3,4, and 5,6 we were publishing the data from 3 python scripts i wrote and everything was working great and the charts were update then it just stopped publishing. I thought it might be a license/message problem as i was sending information every 1 sec so I changed it to ever 60 sec. Everything worked fine again for 5 minutes and then it all crashed It will not let me reconnect and i can't see any data updating from the other Rpi's any Do you have a technical help line or how should i proceed.

I find this is possible to do, but how does one read the data back.