Version History

2.20.1
October 9, 2021

• We have changed the domain name from "simo.com.hk" to "simo.ac". URLs and email addresses in the app have been changed accordingly.
  
• Minor improvements and fixes.

2.20.0
December 1, 2020

• Improved user experience on Apple Silicon Macs.
  
• Added keyboard shortcuts and trackpad/mouse (iPad and Mac only) support for zooming, panning and rotating plots.
  
• Bug fixes and improvements.

2.19.1
October 4, 2020

• Fix a bug that causes the app to crash when the editor is scrolled immediately after a file has been loaded.

2.19.0
September 20, 2020

• Adding support for iOS and iPadOS 14.
• Improved support for iPad trackpad.
• Bug fixes and improvements.

2.18.3
March 5, 2020

• Improve some error messages for pinv().

2.18.2
March 4, 2020

• New function: pinv(). Moore–Penrose inverse, also know as pseudo-inverse.
• Fix a bug in rref()
• Fix a UI bug where the activity indicator does not show up in dark mode.

2.18.1
December 24, 2019

• This is a regular update for bug fixes and improvements

2.18.0
September 18, 2019

• Supporting iOS 13.
• Supporting dark mode.
• New plotting functions: stairs(), stem().
• User can now change line width of a 2D plot.
• Other cosmetic changes and bug fixes.

2.17.4
June 17, 2019

• Fixing a bug that affects .csv file import.

2.17.3
June 9, 2019

• Fixing a minor bug.

2.17.2
June 8, 2019

• New features:
  
  • You can now choose to use the system keyboard, or the built-in custom keyboard. Change the setting in the app: Settings -> Keyboards -> Use System Keyboard.
    
  • You can now swipe down from the top of the keyboard to dismiss.
• Bug fix:
  
  • Fix a bug that may affect loading of files with non UTF8 encoding.
    
  • Fix a bug that may freeze the file list view.

2.17.1
February 4, 2019

• New function: Fibonacci number fibonacci()
  
• Minor bug fixes and improvements.
  

2.17.0
January 31, 2018

• New functions:
  
  • input(). Suspend running and wait for user input.
    
  • realpow(). Real power.
    
  • realsqrt(). Real square roots.
    
• Bug fixes and improvements.
  

2.16.0
December 8, 2018

• New functions:
  
  • Pause running program: pause
    
  • Timing functions: tic, toc
    
  • Current time: date, clock
    
  • Polynomial differentiation and integration: polyder, polyint
    
• Bug fix and improvement.
  

2.15.0
November 1, 2018

• New functions:
  
  • Polynomial division (or deconvolution): deconv()
    
  • Polynomial multiplication (or convolution): conv()
    
  • Digital signal filtering: filter()
    
• Improvement
  
  • Add "#" to the custom keyboard.
    
  • Other bug fixes and minor improvements.
    

2.14.0
September 29, 2018

• New functions:
  
  • Rearranging dimensions: permute(), ipermute()
    
  • Cross product: cross()

2.13.1
September 23, 2018

• Fixing a cosmetic problem in file search view.
  
• ​Adapt to iPhone Xs, Xs Max, and Xr

2.13.0
September 16, 2018

• Supporting iOS 12.
• Bug fix and performance improvement.

2.12.2
August 26, 2018

• Fix a bug that affects scrolling of editor using hardware keyboards.
• Other minor changes.

2.12.1
August 18, 2018

• Improved user experience and robustness of the in-app store.

2.12.0
August 16, 2018

• New features in Editor
  • Line numbers
  • Line highlighting
  • Search/replace text in file
  • Quick access to recently opened files
• New built in functions
  
  • finite difference: diff()
  • numerical derivative: gradient()
  • grid points for evaluating multi-variate functions: ndgrid()
• Improvements & bug fixes
  • meshgrid now works for three variable functions
  • It is more responsive to search files everywhere
  • Fix a performance issue that the UI may become unresponsive when syncing many files with iCloud in the background.

2.11.0
June 23, 2018

• Some user-interface improvements:
  
  • User can search files and folders in the file list.
    
  • Cosmetic changes in the file list to improve clarity.
    
  • New button for managing a file more conveniently (e.g., rename, duplicate).
    
• New built-in functions:
  
  • Cumulative sum, product, maximum, minimum: cumsum, cumprod, cummax, cummin.
• Other improvements and bug fixes.
  

2.10.1
June 4, 2018

• Fix a bug that may affect devices with non US region settings. This bug affects csvread(), syntax highlighting, and manual ticks and limits input for plots.
• Other minor improvements.

2.10.0
May 28, 2018

• Important notice:
  • The document site has been moved to doc.simo.com.hk. We are no longer managing the old document site: www.simo.co.nf. Please update your bookmarks.
• New features:
  
  • Solving linear system of equations: linsolve(), mrdivide(), mldivide()
    
  • QR decomposition: qr()
    
  • Reciprocal of the condition number for matrix inversion: record()
• Responding to user request:
  
  • plot(x,y) and surf(x,y,z) accept Inf and NaN in x, y, or z without giving an error.
• Other minor improvements and bug fix.​

2.9.0
April 7, 2018

• New built-in functions:
  - Reduced row echelon form: rref()
  - LU decomposition: lu()
  - Determinant: det()
  - Number of input/output arguments: nargin(), nargout()
  - Matrix structures: isdiag(), istril(), istriu(), isbanded(), issymmetric(), bandwidth()
  
• Bug fixes and minor improvements.

2.8.1
March 19, 2018

• Bug fix.

2.8.0
March 17, 2018

• New functions: eig(), roots(), poly(), polyval(), cplxpair().
  
• sort() can now sort in descending order.
  
• Bug fix.

2.7.3
Feb 24, 2018

• Fix a bug that may cause execution of csvwrite() not stopping.

2.7.2
Feb 23, 2018

• Functions rank() and eps().
• Functions for writing and reading CSV files: csvwrite(), csvread().
  
• Besides m files, the editor can read/write csv, dat, and txt files.
  
• Showing file sizes in the file list.
  
• Performance improvement & bug fix.

2.7.1
​Jan 23, 2018

• Add the non-conjugate transpose operator .’.
• Bug fixes.

2.7.0
​Jan 05, 2018

• iPhone X support.
  
• Complex number support. All built-in functions and operators have been updated to support complex numbers.
  
• New built-in functions: ctranspose, conj, angle, isreal, complex, imag, real.
  
• Performance enhancement and bug fixes.

2.6.0
​Sept 15, 2017

• iOS 11 ready.
  
• Drag-and-drop ready.
  
• Bug fixes and improvements.

2.5.2
​Aug 18, 2017

• Keyboard width adapts to size of iPad Pro 10.5".

2.5.1
​Aug 9, 2017

• Files can be imported from and exported to another app such as Dropbox and Box.
• Fix a UI bug in the File List.

2.5.0
​Aug 3, 2017

• Every summer, we roll out major updates. This time, we overhaul the plot and add a lot of useful features.
• Plot lines and markers can be customised by passing function arguments (such as '--or') or the new UI.
• Using the new UI, you can change attributes of lines and markers.
• New functions: clc, grid, legend, title, xlim, ylim, zlim, xticks, yticks, zticks.
• Bug fixes and improvements.

2.4.1
​May 15, 2017

• Fix a bug that prevents a folder from being renamed.
• Fix some user-interface bugs in the file list.
• Fix a bug related to file list sorting.

2.4.0
​May 10, 2017

• Include iCloud Drive support. Files on SIMO can be synced across iCloud-enabled devices and computers.
• Please visit tutorial videos on our website to learn how to work with SIMO's iCloud directory on Matlab.
• Dropbox is no longer supported, since Dropbox has discontinued its Sync API on which SIMO depends.
• Users who would like to sync files across devices, please use iCloud.
• "Undo" is now available.
  
• Bug fixes and performance improvement.
• Cosmetic changes.

2.3.3
September 20, 2016

• iOS 10 ready.
• Minor bug fixes.

2.3.2
September 3, 2016

• Minor bug fixes.

2.3.1
August 25, 2016

• Fix a bug that causes unnecessary reformatting of output data.

2.3.0
August 23, 2016

Every summer we release a major update. All users are recommended. This summer we improve the interpreter:

• It now supports character and logical arrays. (Cheers!)
  
• Add 20+ built-in functions:
  
  • (character arrays) num2str, int2str, strcmp, strcmpi, strncmp, strncmpi, upper, lower, isspace, isletter, ischar, strcat, blanks
    
  • (logical arrays) true, false, islogical
    
  • (data type conversion) double, logical, char
    
  • (other functions) ind2sub, sub2ind, xlabel, ylabel, zlabel, error, isnumeric
    
• Console: Hyperlinks to documents are added in error message.
  
• Keyboard shortcut: Now you can switch between the editor and console by hardware keyboard.
  
• Various minor improvements and bug fixes.

2.2.1
July 11, 2016

• Fix a bug that affects devices with iOS 8.2 or lower.

2.2.0
February 24, 2016

• It now runs on iPhones, iPads, and iPod Touches.
  
• ​Various improvements and bug fixes.

2.1.0
January 15, 2016

• Supporting iOS 9 multi-tasking: Split view, slide over, picture-in-picture.
  
• iPad Pro ready.
  
• Optimised for external hardware keyboard:
  
  • Short cut keys.
    
  • Scrolling by arrow keys.
    
  • Option to hide software keyboard.
    
• Bug fixes and various improvements.

2.0.1
October 25, 2015

• Fix a bug that may freeze the app when syntax error occurs.

2.0.0
October 14, 2015

• This is a major update. It brings a lot of new features and improvements.
• Now it supports iOS 9.
• Linking Dropbox much, much faster.
• The user-interface has been significantly re-worked to improve user experience, responsiveness, and speed.
• The plotting engine has been much improved. Graphs are now more stunning and use less system resource.
• Better memory and thread management, and hence faster computation.
• Local and Dropbox folders can now be accessed simultaneously. More storage services (e.g., iCloud) will be included in later versions.
• In addition to creating, deleting and renaming files, you can now move, copy, and duplicate files across the local and Dropbox folders.
• Bug fixes.

1.2.0
May 5, 2015

• New built-in functions:
  • diag
  • find
  • norm
  • scatter
  • sort
  • svd
  • trace
  • tril
  • triu
• ​Bug fixes:
  • Inaccurate heat map in "surf".
  • Glitches in "dispmsg".
  • "return" in a user-defined function unable to return a value.

1.1.1
February 24, 2015

Fixing a bug that some comment statements may cause syntax error.

1.1.0
February 11, 2015

• 20 new built-in functions (random number generating and probability related):
  • erf: error function
  • erfc: complementary error function
  • erfinv: inverse error function
  • erfcinv: inverse complementary error function
  • expcdf: exponential distribution CDF
  • exppdf: exponential distribution PDF
  • expinv: exponential distribution inverse CDF
  • exprnd: exponentially distributed random number
  • rand: uniformly distributed random number
  • randi: uniformly distributed random integer
  • randn: normally distributed random number
  • rng: Reset seed of random number generator
  • normcdf: normal distribution CDF
  • norminv: normal distribution inverse CDF
  • normpdf: normal distribution PDF
  • normrnd: normally distributed random number
  • poisspdf: Poisson distribution CDF
  • poissinv: Poisson distribution inverse CDF
  • poisspdf: Poisson distribution PDF
  • poissrnd: random number with Poisson distribution
• New user forum. Tell us what you think about the app.
• Completely revamped and much improved documentation.
• Improvements and bug fixes:
  • adding line number and filename in syntax error messages,
  • allowing the operator !=,
  • factorial now accepts a much larger number, 
  • std,
  • repmat,
  • reshape,
  • rot90, flipud, fliplr now accept ND arrays,
  • size,
  • ndims.
• Cosmetic changes.

1.0.0
December 2, 2014

​SIMO first launched on App Store.