# Correction to: Greedy sensor selection based on QR factorization

The Original Article was published on 04 December 2021

## 1 Correction to: EURASIP Journal on Advances in Signal Processing (2021) 2021:117 https://doi.org/10.1186/s13634-021-00824-5

1. 1.

In the second paragraph of Section 4.1 (page 8 of 13)

1. a.

$$C_{tr} \approx \left( {N - i} \right)\left( {2p^{2} + 2i^{2} + 2i} \right)$$ should be $$C_{tr} \approx \left( {N - i} \right)\left( {2pi + 2i^{2} } \right)$$

2. 2.

In the second paragraph of Section 4.1 (page 9 of 13)

1. a.

$$C_{{{\text{total}}}} = O\left( {\left| S \right|^{2} \left( {N\left| S \right| - p^{2} } \right)} \right)$$ should be $$C_{{{\text{total}}}} = O\left( {Np\left| S \right|^{2} } \right)$$

3. 3.

Operation count for QRM in Table 1 (page 9 of 13)

1. a.

$$O\left( {\left| S \right|^{2} \left( {N\left| S \right| - p^{2} } \right)} \right)$$ should be $$O\left( {Np\left| S \right|^{2} } \right)$$

4. 4.

Operation count for Proposed method in Table 1 (page 9 of 13)

1. a.

$$O\left( {\left| S \right|^{2} \left( {N\left| S \right| - p^{2} } \right)} \right)$$ should be $$O\left( {Np\left| S \right|^{2} } \right)$$

These errors do not affect the conclusions. The original article has been updated.

## Author information

Authors

### Corresponding author

Correspondence to Yoon Hak Kim. 