Undefined function 'im2single' for input arguments of type 'uint8'

2016 9 12
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更新时间：2019 9 26
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Hi there, I am following VGG CNN practical tutorial. However when I try to convert an image to single format using im2single function it result error:
Undefined function 'im2single' for input arguments of type 'uint8'
This tutorial can be found here: VGG CNN Tutorial I hope anyone can help me to solve the error.
Thank you!

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Stephen23
Stephen23 2016-9-12
编辑：Stephen23 2016-9-12
Do you have the Image Processing Toolbox?
Tell us exactly what the command ver prints out.

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loic_vtc
loic_vtc 2019-9-26

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Yes it was a licensing issue : license activated on another workstation...
Thanks

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