Simulink is a powerful simulating and programming tool. In many applications, we need to write scripts to automate specific tasks. At this time, we often need to obtain or modify the parameter values of the block diagram in command line. get() and get_param() Simulink provides get and get_param functions to Read more…
In Matlab programming, the for loop is a frequently used statement for iterating on arrays. When the array is very large, the execution time of for-loop may be considerably long, and we often expect to obtain information about the executed proportion. Based on this, I wrote the following code to Read more…
The containers.Map of Matlab can create a data structure (or object) that maps values to unique keys. This function is very useful for storing key-value pairs and doing lookup of keys. Syntax M = containers.Map(keySet,valueSet) Usage keySet specifies the keys, its type can be numeric array, cell array of character Read more…
It looks that in newer versions of Matlab, some HMI (Human Machine Interface, e.g., Diagnostic Viewer, Live Scripting) functions are realized by means of local network port communication. However, this approach seems unreliable. From year 2014 to 2020, many users reported the blank Diagnostic Viewer issue in various Matlab versions. Read more…
Simulation Data Inspector is a useful tool to view or compare the simulation results of Simulink. Compared to the Scope block, the Data Inspector is more flexible to use. However, after a period of time, the .dmr file of Data Inspector may become very large. Large .dmr file will affect Read more…
When drawing a graph, we sometimes need to use colors to distinguish different curves. Many years ago, I began to use the Matlab distinguishable_colors function written by Tim Holy to determine the color of the curves used in the paper. However, the output value of distinguishable_colors is not intuitive enough, Read more…
Recently I discovered an undocumented feature of Simulink, i.e., plot bold line in block mask’s icon drawing commands. Limitations of the plot in icon drawing commands The plot function in the mask is a reduced plotting function. If we specify the linewidth parameter to it, an error will be prompted: Read more…
Matlab has **c2d** function to do the continuous to discrete time transformation. However, sometimes you may want to implement your own discretization method. This is what this article aims for.
Y=filter2(h,x,’shape’) h为滤波器，x为要滤波的数据，将h放在x上移动进行模板滤波。shape可取 full, same, valid (不写默认是same)。本篇文章采用滑动平均fspecial(‘average’)创建一个均值滤波器，举例说明filter2的用法。
Chinese Title: 为 Simulink Embedded Coder 增加模块中间变量的初始化功能 Transfer Function of First-Order LPF For a simulink block, the mask’s initialization commands is not included in the generated code. Take a first-order low-pass filter for example, the Laplace transfer function { Y(s) = \cfrac{\omega}{s+\omega}} In the time domain, {y_n = a \cdot Read more…