Octave:如何索引数组中的单个元素

Question

我用Octave编写了以下代码：

1 %-----------------------------------------------------------------------------% 
2 % INPUT SIGNAL %                                                                
3 %-----------------------------------------------------------------------------% 
4                                                                                 
5 sampling_frequency = 8000;                                                      
6 sampling_period = 1/sampling_frequency;                                         
7 samples_count = 8;                                                              
8 time_samples = sampling_period * (0 : samples_count-1);                         
9                                                                                 
10                                                                                 
11 amplitude_1 = 1;                                                                
12 frequency_1 = 1000;                                                             
13 phase_shift_1 = 0;                                                              
14 signal_samples_1 = amplitude_1*sin(2*pi * frequency_1 * ...             
15     time_samples + phase_shift_1);                                              
16                                                                                 
17                                                                                 
18 amplitude_2 = 0.5;                                                              
19 frequency_2 = 2000;                                                             
20 phase_shift_2 = 3*pi/4;                                                         
21 signal_samples_2 = amplitude_2*sin(2*pi * frequency_2 * ...             
22     time_samples + phase_shift_2);                                              
23                                                                                 
24 signal_samples = signal_samples_1 + signal_samples_2;             
25 for samples_index = 0 : samples_count-1                                         
26     fprintf(stdout, "Sample %d: ", samples_index)                               
27 endfor                                                                          
28                                          

正如你所看到的，在25行，我想在单独的行打印每个样本的值，即

Sample <sample_number>: <sample_value>

我的问题是：如何索引数组的单独成员(例如input_signal数组(？

Answer 1

我已经自己找到了解决方案，所以我想与您分享。

signal_samples = signal_samples_1 + signal_samples_2;                           
for samples_index = 1 : samples_count                                           
fprintf(stdout, "Sample %d: %8.5fn", samples_index-1, ...                    
signal_samples(samples_index:samples_index))                            
endfor                                                                                                                   

输出：

Sample 0:  0.35355
Sample 1:  0.35355
Sample 2:  0.64645
Sample 3:  1.06066
Sample 4:  0.35355
Sample 5: -1.06066
Sample 6: -1.35355
Sample 7: -0.35355