interactive | 易学教程

Is there a way to automatically suppress Matlab from printing big matrices in command window?

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问题 Is there an option in matlab or a plugin/app or a trick such that if you are in an interactive command session, every time it would print out a matrix way too big for a human to look through, it redacts the output to either a warning of how big the matrix is or a summary (only a few rows and columns) of the matrix? There are many times where I want to examine a matrix in the command window, but I didn't realize how big it was, so I accidentally printed the whole thing out. Or some place

How to add interactive UILabels on top of a UIImageView?

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I need to add few labels on top of an UIImageView . The labels' text can be changed by tapping on them. What is the best way to achieve this? I am using Swift programming language. Looking up some solutions on stackoverflow, I found a couple of walkthroughs that use String.drawInRect method to draw some text in a rectangle which is then placed on the UIImageView . But like this I don't think I will be able to change the text, or even recognize a touch event on them. Please help. UPDATE My code so far: override func viewDidLoad() { super.viewDidLoad() let img = UIImage(named: "Image") let

start interactive mode on a specific script line

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问题 I need to run my Python script as usual, but I want to stop execution on a specific line and start interactive mode. In other words, I want to be able to check the value of all my variables at that point, and continue myself from there on python's command line. How can I do this? 回答1: This can be done with the code module. The easiest way is to call code.interact(). 回答2: Use a debugger and add breakpoints. Do you use an IDE? All the major IDEs have debugger support. From the CLI, you can use

list of methods for python shell?

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You'd have already found out by my usage of terminology that I'm a python n00b. straight forward question: How can i see a list of methods for a particular object in an interactive python shell like i can in ruby (you can do that in ruby irb with a '.methods' after the object)? Existing answers do a good job of showing you how to get the ATTRIBUTES of an object, but do not precisely answer the question you posed -- how to get the METHODS of an object. Python objects have a unified namespace (differently from Ruby, where methods and attributes use different namespaces). Consider for example: >>

Two interactive bokeh plots: select a value in one graph and change the other

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I want to create an interactive python Bokeh plot. I have two dataframes which are linked by the column names . When I select a bar in plot1 I want to show in plot 2 the data of dataframe 2 (df2) that belong to that column. For example the df1 could contain the mean of all columns of df2. If you click on the displayed mean you can sea in the second graph the rawdata that formed the basis for the mean. Unfortunately I cannot get it working and I could not find a comparable example. Below is what I have so far. I assume the error is in mycolumn="@colnames" and the taptool is not returning what I

interactive lua: command line arguments

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问题 I wish to do lua prog.lua arg1 arg2 from the command line Inside prog.lua, I want to say, for instance print (arg1, arg2, '\n') Lua doesn't seem to have argv[1] etc and the methods I've seen for dealing with command line arguments seem to be immature and / or cumbersome. Am I missing something? 回答1: You're missing the arg vector, which has the elements you want in arg[1] , arg[2] , and so on: % lua -i -- /dev/null one two three Lua 5.1.3 Copyright (C) 1994-2008 Lua.org, PUC-Rio > print(arg[2]

Interactive Delegate Methods Never Called

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问题 I want to make an interactive transition between a ViewController (1) and a NavigationViewController (2). The NavigationController is called by a button, so there's no interactive transition when presenting. It can be dismissed by a button or a UIPanGestureRecognizer, so it can be dismissed interactively or not. I have an object named TransitionManager for the transition, subclass of UIPercentDrivenInteractiveTransition. The problem with the code below is that the two delegate methods

Interactive plotting with R raster: values on mouseover

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问题 I'd like to do a small program in R for interactive visualization and modification of some raster datasets, seen as colored images. The user should open a file (from the terminal it's OK), plot it, select the points to edit with mouse clicks, and insert the new values. So far I achieved that easily. I use the plot() function from the raster package to visualize the plot, then click() to select the points and edit their value via the terminal. I'd like to add the ability to show the values on

Is there a way to automatically suppress Matlab from printing big matrices in command window?

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Is there an option in matlab or a plugin/app or a trick such that if you are in an interactive command session, every time it would print out a matrix way too big for a human to look through, it redacts the output to either a warning of how big the matrix is or a summary (only a few rows and columns) of the matrix? There are many times where I want to examine a matrix in the command window, but I didn't realize how big it was, so I accidentally printed the whole thing out. Or some place inside a function I did not code myself, someone missed a semicolon and I handed it a big matrix, and it

Is it possible to build a interactive C shell?

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问题 I'm just wondering if this is possible using either (Python, Java or C)? I'm looking for something like IPython for Python. 回答1: Yes, and such things already exist, you just have to google for them :-) Ch is one popular example CINT is another That said, actually developing a functional interpreter like this from scratch is much more difficult than finding one online. So now it depends on what's behind your question - do you want just an interpreter to use? Then pick one of the linked above.