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You can save and load data in octave easily with the two commands save and load. Whos Provide detailed information on currently defined variables.Ĭlear will clear all variables or only the ones who are named. Who Lists currently defined varibales matchin the given pattern. For Matrix objects, the length is the number of rows or columns, whichever is greater (this odd definition is used for compatibility with MATHLAB). Length(A) Return the length of the object A. Size(A ) Return the number of rows and colums of A. y is the number of buckets.Įye(x ]) Produces an identity matrix. Hist(x ) Produce histogram counts of plots. The arguments are handled the same as the arguments for rand.
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Randn(x ) Return a matrix with normally distributed random elements having zero mean and variance one. Rand(x ) Return a matrix with random elements uniformly distributed on the interval (0, 1).
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Zeros(x ) behaves the same as ones() but will give a zero-matrix.
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If y is provides it has the size x cross y. If only x is provided it is a squared matrix of size x. Help _function name_ will give you the man page of this function. Beware that ocatve is 1 based.ĭisplaying a range of numbers use v(3:5) to display the 3rd, 4th, and 5th number. To display the 5th number of this vectors use v(5). V = 1:0.1:2 also creates a vector but with the numbers from one to two with a step size of 0.1. V = 1:5 creates a 1x5 Matrix (linear vector) with the numbers one to five. Hint: I also mad an octave docset for Dash: BasicsĪ semicolon at the end of a line will suppress the output Notice that the text height relative to the figure size should look very different because the figure window has a size of 560x420 pixels and the printed version is 1200x900 pixels.GNU Octave is a high-level interpreted language, primarily intended for numerical computations. Looking at the png output you provided, there are 13 pixels between baselines of the legend labels. The font size in pixels for the png should be 6 * 150 / 72 = 12.5 pixels. The size of the printed png is 1200x900, so that checks out. The size of png output produced by print() is determined by. Thus, it looks to me as if your monitor's dpi is about 140-150 dpi.ĭpi_monitor = get (0, "screenpixelsperinch") Looking at the png of your figure, I notice the font size is about 12 pixels. You've set it to 6pts, which will display as 6*dpi_monitor/72 pixels. There may be a problem with the fontsizes, but looking at your examples, they look correct to me. I may still be completely missing something, but could you at least confirm that matlab's behavior is what one would expect, that is, (mathematical) similarity of plotted and printed figure? Of course the size of the final figure depends on the screen or print resolution, but that should be unique across the entire figure, so that the bars and not scaled differently than the legends. I just checked matlab, and everything (plot and print) looks absolute identical there, which is what I would expect. To Ben: ("Using x11 the relative size does change as the figure is resized.") - Same thing. If the right bar is, say, 10 times as tall as the the legends are thick, then they remain so if I resize the window. To Jordi: ("Isn't this relative size also different if you resize the plot window?") - No it is not. I'm really lost now, and I am still not convinced that we talk about the same thing. In any event, please verify I am seeing the problem you're reporting. Ultimately, we gave up on this due to unreliable and ugly results. Some of our developers had attempted to approximate the bbox of text objects and implement the legend in octave (without gnuplot's key feature). Unfortunately gnuplot's design allows each terminal to implement such things inconsistently. For the gnuplot backend the placement is determined by gnuplot. However, the position of the legend is different.įor the OpenGL backend Octave explicitly specifies the legend position. The text sizes are spacing of the legend entries are the same. Print ('-dpng', sprintf ('%s.png', name))īoth the Octave (tip 0fea4cf22f88) and Matlab (R2011b) results are attached. I wrote a similar script that runs under both Octave and Matlab.