Dagmar Fraser
@dagmarfraser.bsky.social
Doctoral Researcher: Autism, Social Cognition & Bodily Movement Lab (jencooklab.com), Senior Centre Technician: CHBH (birmingham.ac.uk/research/centre-for-human-brain-health) & MATLAB Ambassador. X @dagmarfraser He/Him (orcid.org/0000-0002-9241-7772)
Running this reveals a whole gallery of hidden images! 🖼️ This is steganography - hiding data within data! 🔐 The MATLAB developers embedded these images in the binary structure of the original data. 🤯
There is a full explanation of these images here - blogs.mathworks.com/steve/2006/1...
There is a full explanation of these images here - blogs.mathworks.com/steve/2006/1...
December 18, 2024 at 11:16 AM
Running this reveals a whole gallery of hidden images! 🖼️ This is steganography - hiding data within data! 🔐 The MATLAB developers embedded these images in the binary structure of the original data. 🤯
There is a full explanation of these images here - blogs.mathworks.com/steve/2006/1...
There is a full explanation of these images here - blogs.mathworks.com/steve/2006/1...
Did you know MATLAB has secret images hidden in plain sight? 🔍
Type `image` in your command window. You'll see a mysterious upside-down boy's face in blue tones. But that's just the beginning... 🎯 🤫
#MATLAB #MATLABTAmbassador
Type `image` in your command window. You'll see a mysterious upside-down boy's face in blue tones. But that's just the beginning... 🎯 🤫
#MATLAB #MATLABTAmbassador
December 18, 2024 at 11:16 AM
Did you know MATLAB has secret images hidden in plain sight? 🔍
Type `image` in your command window. You'll see a mysterious upside-down boy's face in blue tones. But that's just the beginning... 🎯 🤫
#MATLAB #MATLABTAmbassador
Type `image` in your command window. You'll see a mysterious upside-down boy's face in blue tones. But that's just the beginning... 🎯 🤫
#MATLAB #MATLABTAmbassador
🍕 The pizza spread was epic!
Hawaiian
Texas BBQ
Vegetarian Supreme
Chicken, Mushrooms & Olives
Pepperoni
Tandoori Hot
Just Cheese
Hawaiian
Texas BBQ
Vegetarian Supreme
Chicken, Mushrooms & Olives
Pepperoni
Tandoori Hot
Just Cheese
December 10, 2024 at 12:25 PM
🍕 The pizza spread was epic!
Hawaiian
Texas BBQ
Vegetarian Supreme
Chicken, Mushrooms & Olives
Pepperoni
Tandoori Hot
Just Cheese
Hawaiian
Texas BBQ
Vegetarian Supreme
Chicken, Mushrooms & Olives
Pepperoni
Tandoori Hot
Just Cheese
💻 EEGLAB is an open-source analysis toolbox, amongst the most widely used packages for EEG research for over two decades. A recent survey shows a whopping 63% of researchers have used it for ERP plotting…. But watch out for newcomers! 📈
November 26, 2024 at 11:45 PM
💻 EEGLAB is an open-source analysis toolbox, amongst the most widely used packages for EEG research for over two decades. A recent survey shows a whopping 63% of researchers have used it for ERP plotting…. But watch out for newcomers! 📈
On Mac/PC I did need to quit Zotero occasionally when messing in Word. I found dis-abling this made my crashes much more manageable.
November 21, 2024 at 2:44 PM
On Mac/PC I did need to quit Zotero occasionally when messing in Word. I found dis-abling this made my crashes much more manageable.
❤️ But like all open source projects, PTB depends on a small team of dedicated developers. For just 200€/year, you can support PTB and its wonderfully irascible maintainer Mario Kleiner (www.psychtoolbox.net#service)
November 5, 2024 at 12:45 PM
❤️ But like all open source projects, PTB depends on a small team of dedicated developers. For just 200€/year, you can support PTB and its wonderfully irascible maintainer Mario Kleiner (www.psychtoolbox.net#service)
📊 By 2018, PTB had been downloaded 285,897 times and appears in thousands of papers annually. From humble beginnings to a cornerstone of psychological science!
November 5, 2024 at 12:45 PM
📊 By 2018, PTB had been downloaded 285,897 times and appears in thousands of papers annually. From humble beginnings to a cornerstone of psychological science!
🌉 The breakthrough? PTB let researchers write simple high-level code while maintaining millisecond-precise control of display & sound hardware. Like having a research assistant who speaks both English and machine code fluently!
November 5, 2024 at 12:44 PM
🌉 The breakthrough? PTB let researchers write simple high-level code while maintaining millisecond-precise control of display & sound hardware. Like having a research assistant who speaks both English and machine code fluently!
📊 Delightful new preprint reveals a meta *power law* in physics! The mathematical symbols & operators we use to describe nature's laws... follow their own mathematical pattern! (image from New Scientist)
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
October 29, 2024 at 2:18 PM
📊 Delightful new preprint reveals a meta *power law* in physics! The mathematical symbols & operators we use to describe nature's laws... follow their own mathematical pattern! (image from New Scientist)
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
What lies between a function and its derivatives? In kinematic terms; between Position and Velocity? Between Velocity and Acceleration? We can see a pattern in d^N/dt^N... but what if N was 0.5? 🤔
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
October 22, 2024 at 12:43 PM
What lies between a function and its derivatives? In kinematic terms; between Position and Velocity? Between Velocity and Acceleration? We can see a pattern in d^N/dt^N... but what if N was 0.5? 🤔
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
#MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
Other noises? Yes... if we generalise an exponent α;
1/f^-2 Blue Noise
1/f^-1 Violet Noise
1/f^0 White Noise
1/f^1 Pink Noise (a common behaviour in biological systems!)
1/f^2, Red Noise / Brownian Noise (drunkard’s walk!)
1/f^2+ sometimes called Black Noise.
1/f^-2 Blue Noise
1/f^-1 Violet Noise
1/f^0 White Noise
1/f^1 Pink Noise (a common behaviour in biological systems!)
1/f^2, Red Noise / Brownian Noise (drunkard’s walk!)
1/f^2+ sometimes called Black Noise.
October 15, 2024 at 5:09 PM
Other noises? Yes... if we generalise an exponent α;
1/f^-2 Blue Noise
1/f^-1 Violet Noise
1/f^0 White Noise
1/f^1 Pink Noise (a common behaviour in biological systems!)
1/f^2, Red Noise / Brownian Noise (drunkard’s walk!)
1/f^2+ sometimes called Black Noise.
1/f^-2 Blue Noise
1/f^-1 Violet Noise
1/f^0 White Noise
1/f^1 Pink Noise (a common behaviour in biological systems!)
1/f^2, Red Noise / Brownian Noise (drunkard’s walk!)
1/f^2+ sometimes called Black Noise.
Making all the right noises...
MATLAB has wgn for White (Gaussian) Noise and pinknoise for Pink. The power spectral density (PSD) of Pink is 1/f and so drops off as f increases (-10dB/dec as pictured). #MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
MATLAB has wgn for White (Gaussian) Noise and pinknoise for Pink. The power spectral density (PSD) of Pink is 1/f and so drops off as f increases (-10dB/dec as pictured). #MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
October 15, 2024 at 5:07 PM
Making all the right noises...
MATLAB has wgn for White (Gaussian) Noise and pinknoise for Pink. The power spectral density (PSD) of Pink is 1/f and so drops off as f increases (-10dB/dec as pictured). #MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
MATLAB has wgn for White (Gaussian) Noise and pinknoise for Pink. The power spectral density (PSD) of Pink is 1/f and so drops off as f increases (-10dB/dec as pictured). #MATLAB #MATLABAmbassador #academicsky #psychology #psychscisky
You can keep on going (in both directions!) as noted in this delightfully retro Web 0.1 page - www.mathnstuff.com/math/spoken/...
October 8, 2024 at 12:10 PM
You can keep on going (in both directions!) as noted in this delightfully retro Web 0.1 page - www.mathnstuff.com/math/spoken/...
this is by Dr David Wilby now an RSE with Antarctic Survey! www.davidwilby.dev but formerly x.com/RSE_Sheffield
October 1, 2024 at 7:05 PM
this is by Dr David Wilby now an RSE with Antarctic Survey! www.davidwilby.dev but formerly x.com/RSE_Sheffield
There is an excellent in-depth guide to that and more in "A concise guide to reproducible MATLAB projects" to make folders for disparate elements of your code rse.shef.ac.uk/blog/2022-05...
October 1, 2024 at 7:05 PM
There is an excellent in-depth guide to that and more in "A concise guide to reproducible MATLAB projects" to make folders for disparate elements of your code rse.shef.ac.uk/blog/2022-05...