How to use multiple variables in a name structure

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Nik Rocky
Nik Rocky 2020-6-23
评论： Nik Rocky 2020-6-23
Hello,
a simple question please answer or show me a help file - I can't find it:
I get a filename
fig_name = [name, '_PLL.png'];
and get
'001_m1_60_const_20200611_200515_PLL.png'
now, I want have more variable in my fig_name, to get:
'001_m1_60_const_20200611_200515_SNR_1_PLL.png'
'001_m1_60_const_20200611_200515_SNR_2_PLL.png'
'001_m1_60_const_20200611_200515_SNR_3_PLL.png'
...
'001_m1_60_const_20200611_200515_SNR_N_PLL.png'
I tried allready with:
fig_name = [name,'_SNR_',SNR,'_PLL.png']
but I get just:
fig_name = '001_m1_60_const_20200611_200515_SNR__PLL.png'
What is wrong? What is a rule to create a names with usin of variables?
Thank you!

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回答（2 个）

madhan ravi
madhan ravi 2020-6-23
compose('001_m1_60_const_20200611_200515_SNR_%d_PLL.png', (1:3).')
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Stephen23
Stephen23 2020-6-23
编辑：Stephen23 2020-6-23
The most efficient approach is to use sprintf (and is what experienced MATLAB users would do):
for k = ...
fig_name = sprintf('%s_SNR_%u_PLL.png',name,k);
...
end
You should avoid using i as a variable name, as this shadows the inbuilt imaginary unit i.
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Stephen23
Stephen23 2020-6-23
What you showed is a table for C's sprintf, apparently copied from here:
http://www.cplusplus.com/reference/cstdio/printf/
It supports a different set options than MATLAB's sprintf, although there is some overlap.
To know what options MATLAB's sprintf supports, refer to the MATLAB documentation:
https://www.mathworks.com/help/matlab/ref/sprintf.html
Nik Rocky
Nik Rocky 2020-6-23
Oh, thank you! Its good to know. than the table is not compatible. Should I better delete it?

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