octave | 易学教程

Octave: How to turn a vector of integers into a cell array of strings?

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问题 In Octave: Given a vector a = 1:3 How to turn vector "a" into a cell array of strings {'1','2','3'} (Output of this:) ans = { [1,1] = 1 [1,2] = 2 [1,3] = 3 } ( question end ) Further information: my aim is to use a as the input of strcat('x',a) to get ans = { [1,1] = x1 [1,2] = x2 [1,3] = x3 } Other solutions how to reach this aim are welcome, but the main question is about getting an array of strings directly from a vector. This question is a follow-up from cell array, add suffix to every

Pick a struct element by field name and some non-sequential index

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问题 I mean to use a struct to hold a "table": % Sample data % idx idxstr var1 var2 var3 % 1 i01 3.5 21.0 5 % 12 i12 6.5 1.0 3 The first row contains the field names. Assume I created a struct ds2 = struct( ... 'idx', { 1, 12 }, ... 'idxstr', { 'i01', 'i12' }, ... 'var1', { 3.5, 6.5 }, ... 'var2', { 21, 1 }, ... 'var3', { 5, 3 } ... ); How can I retrieve the value for field var2 , for the row corresponding to idxstr equal to 'i01' ? Note: that I cannot ensure the length of idxstr elements will

后MATLAB时代的七种开源替代，一种堪称完美！

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近日，有哈工大学生表示收到了正版软件取消激活的通知，而在与 MATLAB 开发公司 MathWorks 交涉之后，被告知由于美国政府实体名单的原因，相关授权已被中止。目前，哈尔滨工业大学、哈尔滨工程大学的老师和学生们都无法使用 MATLAB。 MATLAB大学读理工科专业的同学基本上都接触过这款软件。有分析人士指出，如果整个学校被禁用了正版 MATLAB，这意味着学校的人员再发表论文或者从事商业项目，其成果原则上就不应包含任何基于 MATLAB 的内容，这对国内相关企业和研究学者带来的影响不可忽视。这件事在国内社交媒体迅速发酵并登上热搜，引发学术界和技术界的广泛讨论。现在只是禁止了实体名单的上的几所高校，但是谁又能保证后续不会加码制裁打击中国高校，抑制中国科技发展呢？因此通过此次禁用事件，我们有理由说现在已经到了后MATLAB时代！急需找到MATLAB合适的替代品。为此我们收集整理到的一些开源软件，可以起到一定的替代效果。包括：SCILAB、Octave、Spyder、Python、GMAT、GNU Radio、ROS。特别是SCILAB，他与MATLAB最为接近，近乎可以实现完美替代！希望本文对大家有所帮助。另外，也欢迎大家在留言区推荐你知道的替代工具。 1. “近乎完美”替代之SCILAB SCILAB 是一款与 MATLAB 类似的开源软件，可以实现 MATLAB

Can end statement replace endfor statement in Octave?

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问题 This link illustrates that we should use endfor statement to close the scope of for loop. But replacing it with end results into the same behavior. Does using end rather than endfor have any unexpected side effects? 回答1: end is synonymous with endfor when closing a for loop. The only side effect of using end is that your code will also be compatible with MATLAB, as endfor is an extension of the language invented by Octave. I recommend that you do not use endfor and the like ( endif ,